diff --git a/Documentation/UserManual/ProgrammingGuide.pdf b/Documentation/UserManual/ProgrammingGuide.pdf
index 7eff4fb..97b6444 100644
Binary files a/Documentation/UserManual/ProgrammingGuide.pdf and b/Documentation/UserManual/ProgrammingGuide.pdf differ
diff --git a/Documentation/UserManual/ProgrammingGuide.tex b/Documentation/UserManual/ProgrammingGuide.tex
index a3d502a..3f4b66b 100644
--- a/Documentation/UserManual/ProgrammingGuide.tex
+++ b/Documentation/UserManual/ProgrammingGuide.tex
@@ -212,7 +212,9 @@ Some commands are both events and queries, depending on whether the question mar
 \section{Commands}
 \subsection{General Commands}
 \subsubsection{*IDN}
-\query{Returns the identifications string}{*IDN?}{None}{LibreVNA-GUI}
+\query{Returns the identifications string}{*IDN?}{None}{LibreVNA,LibreVNA-GUI,dummy\_serial,<software version>}
+\subsubsection{*OPC}
+\query{Returns a 1 after every previous command has been handled}{*OPC?}{None}{1}
 \subsubsection{*LST}
 \query{Lists all available commands}{*LST?}{None}{List of commands, separated by newline}
 \subsection{Device Commands}
@@ -249,6 +251,22 @@ This section contains general device commands, available regardless of the curre
 VNA
 \end{example}
 
+\subsubsection{DEVice:SETUP:SAVE}
+\event{Saves the GUI setup to a file}{DEVice:SETUP:SAVE}{<filename>}
+Important points when saving/loading setup files through SCPI commands:
+\begin{itemize}
+\item Filenames must be either absolute or relative to the location of the GUI application.
+\item If the LibreVNA-GUI (and thus also the SCPI server) is running on a different machine than the SCPI client, the setup files will be saved/loaded from the machine that runs the GUI.
+\item If no (or a wrong) file ending is specified, ``.setup'' is automatically added to the filename.
+\end{itemize}
+
+\subsubsection{DEVice:SETUP:LOAD}
+\query{Loads a setup file}{DEVice:SETUP:LOAD?}{<filename>}{TRUE or FALSE}
+\begin{itemize}
+\item Filenames must be either absolute or relative to the location of the GUI application.
+\item The filename must include the file ending ``.setup''.
+\end{itemize}
+
 \subsubsection{DEVice:REFerence:OUT}
 \event{Sets the reference output frequency}{DEVice:REFerence:OUT <freq>}{<freq> in MHz, either 0 (disabled), 10 or 100}
 \query{Queries the reference output frequency}{DEVice:REFerence:OUT?}{None}{Output frequency in MHz}
@@ -561,7 +579,6 @@ Any number of measurements can be specified (by their number). These measurement
 Important points when saving/loading calibration files through SCPI commands:
 \begin{itemize}
 \item Filenames must be either absolute or relative to the location of the GUI application.
-\item SCPI parsing implicitly capitalizes all commands, the file will be saved using only uppercase letters. Similarly, it is not possible to load a file whose filename contains lowercase characters.
 \item If the LibreVNA-GUI (and thus also the SCPI server) is running on a different machine than the SCPI client, the calibration files will be saved/loaded from the machine that runs the GUI.
 \end{itemize}
 
diff --git a/Documentation/UserManual/SCPI_Examples/deembedding_test.py b/Documentation/UserManual/SCPI_Examples/deembedding_test.py
new file mode 100644
index 0000000..8e748a5
--- /dev/null
+++ b/Documentation/UserManual/SCPI_Examples/deembedding_test.py
@@ -0,0 +1,50 @@
+#!/usr/bin/env python3
+
+import time
+from libreVNA import libreVNA
+
+# Create the control instance
+vna = libreVNA('localhost', 19542)
+
+# Quick connection check (should print "LibreVNA-GUI")
+print(vna.query("*IDN?"))
+
+vna.cmd(":VNA:DEEMB:CLEAR")
+vna.cmd(":VNA:DEEMB:NEW PORT_EXTENSION")
+vna.cmd(":VNA:DEEMB:NEW 2XTHRU")
+vna.cmd(":VNA:DEEMB:NEW MATCHING_NETWORK")
+vna.cmd(":VNA:DEEMB:NEW IMPEDANCE_RENORMALIZATION")
+
+print("Number of total deembedding options:")
+num_options = int(vna.query(":VNA:DEEMB:NUM?"))
+print(num_options)
+
+for i in range(1, num_options+1):
+	option_name = vna.query(":VNA:DEEMB:TYPE? "+str(i))
+	print("Option "+str(i)+": "+option_name)
+	
+# edit port extension
+vna.cmd(":VNA:DEEMB:1:PORT 2")
+vna.cmd(":VNA:DEEMB:1:DELAY 0.00002")
+vna.cmd(":VNA:DEEMB:1:DCLOSS 1")
+vna.cmd(":VNA:DEEMB:1:LOSS 3")
+vna.cmd(":VNA:DEEMB:1:FREQUENCY 5000000000")
+
+vna.cmd(":VNA:DEEMB:3:PORT 3")
+vna.cmd(":VNA:DEEMB:3:CLEAR")
+vna.cmd(":VNA:DEEMB:3:ADD FALSE")
+vna.cmd(":VNA:DEEMB:3:NEW ParallelC")
+vna.cmd(":VNA:DEEMB:3:NEW SeriesR")
+vna.cmd(":VNA:DEEMB:3:NEW ParallelL")
+vna.cmd(":VNA:DEEMB:3:NEW SeriesL")
+vna.cmd(":VNA:DEEMB:3:NEW touchstone_shunt")
+
+vna.cmd(":VNA:DEEMB:3:1:VALUE 0.0001")
+vna.cmd(":VNA:DEEMB:3:2:VALUE 0.00002")
+vna.cmd(":VNA:DEEMB:3:3:VALUE 0.000003")
+vna.cmd(":VNA:DEEMB:3:4:VALUE 0.000004")
+
+vna.cmd(":VNA:DEEMB:3:5:FILE TEST.S2P")
+
+vna.cmd(":VNA:DEEMB:4:IMPedance 75")
+
diff --git a/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/librevnausbdriver.cpp b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/librevnausbdriver.cpp
index d3d7dd8..7a9c33a 100644
--- a/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/librevnausbdriver.cpp
+++ b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/librevnausbdriver.cpp
@@ -14,6 +14,7 @@ using USBID = struct {
 static constexpr USBID IDs[] = {
     {0x0483, 0x564e},
     {0x0483, 0x4121},
+    {0x1209, 0x4121},
 };
 
 USBInBuffer::USBInBuffer(libusb_device_handle *handle, unsigned char endpoint, int buffer_size) :
diff --git a/Software/PC_Application/LibreVNA-GUI/appwindow.cpp b/Software/PC_Application/LibreVNA-GUI/appwindow.cpp
index fc27de9..720ceef 100644
--- a/Software/PC_Application/LibreVNA-GUI/appwindow.cpp
+++ b/Software/PC_Application/LibreVNA-GUI/appwindow.cpp
@@ -477,7 +477,10 @@ void AppWindow::CreateToolbars()
 void AppWindow::SetupSCPI()
 {
     scpi.add(new SCPICommand("*IDN", nullptr, [=](QStringList){
-        return "LibreVNA-GUI";
+        return "LibreVNA,LibreVNA-GUI,dummy_serial,"+appVersion;
+    }));
+    scpi.add(new SCPICommand("*OPC", nullptr, [=](QStringList){
+        return "1";
     }));
     auto scpi_dev = new SCPINode("DEVice");
     scpi.add(scpi_dev);
@@ -518,6 +521,27 @@ void AppWindow::SetupSCPI()
         ret.chop(1);
         return ret;
     }));
+    auto scpi_setup = new SCPINode("SETUP");
+    scpi_dev->add(scpi_setup);
+    scpi_setup->add(new SCPICommand("SAVE", [=](QStringList params) -> QString {
+        if(params.size() != 1) {
+            // no filename given
+            return SCPI::getResultName(SCPI::Result::Error);
+        }
+        SaveSetup(params[0]);
+        return SCPI::getResultName(SCPI::Result::Empty);
+    }, nullptr, false));
+    scpi_setup->add(new SCPICommand("LOAD", nullptr, [=](QStringList params) -> QString {
+        if(params.size() != 1) {
+            // no filename given
+            return SCPI::getResultName(SCPI::Result::False);
+        }
+        if(!LoadSetup(params[0])) {
+            // some error when loading the setup file
+            return SCPI::getResultName(SCPI::Result::False);
+        }
+        return SCPI::getResultName(SCPI::Result::True);
+    }, false));
     auto scpi_ref = new SCPINode("REFerence");
     scpi_dev->add(scpi_ref);
     scpi_ref->add(new SCPICommand("OUT", [=](QStringList params) -> QString {
@@ -1182,13 +1206,13 @@ nlohmann::json AppWindow::SaveSetup()
     return j;
 }
 
-void AppWindow::LoadSetup(QString filename)
+bool AppWindow::LoadSetup(QString filename)
 {
     ifstream file;
     file.open(filename.toStdString());
     if(!file.is_open()) {
         qWarning() << "Unable to open file:" << filename;
-        return;
+        return false;
     }
     nlohmann::json j;
     try {
@@ -1197,12 +1221,13 @@ void AppWindow::LoadSetup(QString filename)
         InformationBox::ShowError("Error", "Failed to parse the setup file (" + QString(e.what()) + ")");
         qWarning() << "Parsing of setup file failed: " << e.what();
         file.close();
-        return;
+        return false;
     }
     file.close();
     LoadSetup(j);
     QFileInfo fi(filename);
     lSetupName.setText("Setup: "+fi.fileName());
+    return true;
 }
 
 void AppWindow::LoadSetup(nlohmann::json j)
diff --git a/Software/PC_Application/LibreVNA-GUI/appwindow.h b/Software/PC_Application/LibreVNA-GUI/appwindow.h
index 1db476a..e47376e 100644
--- a/Software/PC_Application/LibreVNA-GUI/appwindow.h
+++ b/Software/PC_Application/LibreVNA-GUI/appwindow.h
@@ -68,7 +68,7 @@ private slots:
     void DeviceFlagsUpdated();
     void DeviceInfoUpdated();
     void SaveSetup(QString filename);
-    void LoadSetup(QString filename);
+    bool LoadSetup(QString filename);
 private:
     nlohmann::json SaveSetup();
     void LoadSetup(nlohmann::json j);
diff --git a/Software/PC_Application/LibreVNA-GUI/scpi.cpp b/Software/PC_Application/LibreVNA-GUI/scpi.cpp
index cc78f69..4684033 100644
--- a/Software/PC_Application/LibreVNA-GUI/scpi.cpp
+++ b/Software/PC_Application/LibreVNA-GUI/scpi.cpp
@@ -105,7 +105,6 @@ void SCPI::input(QString line)
         if(cmd[0] == ':') {
             cmd.remove(0, 1);
         }
-        cmd = cmd.toUpper();
         auto response = lastNode->parse(cmd, lastNode);
         emit output(response);
     }
@@ -274,7 +273,7 @@ QString SCPINode::parse(QString cmd, SCPINode* &lastNode)
         // have not reached a leaf, find next subnode
         auto subnode = cmd.left(splitPos);
         for(auto n : subnodes) {
-            if(SCPI::match(n->name, subnode)) {
+            if(SCPI::match(n->name, subnode.toUpper())) {
                 // pass on to next level
                 return n->parse(cmd.right(cmd.size() - splitPos - 1), lastNode);
             }
@@ -292,9 +291,14 @@ QString SCPINode::parse(QString cmd, SCPINode* &lastNode)
             cmd.chop(1);
         }
         for(auto c : commands) {
-            if(SCPI::match(c->name(), cmd)) {
+            if(SCPI::match(c->name(), cmd.toUpper())) {
                 // save current node in case of non-root for the next command
                 lastNode = this;
+                if(c->convertToUppercase()) {
+                    for(auto &p : params) {
+                        p = p.toUpper();
+                    }
+                }
                 if(isQuery) {
                     return c->query(params);
                 } else {
diff --git a/Software/PC_Application/LibreVNA-GUI/scpi.h b/Software/PC_Application/LibreVNA-GUI/scpi.h
index 8a7f37d..f56f92e 100644
--- a/Software/PC_Application/LibreVNA-GUI/scpi.h
+++ b/Software/PC_Application/LibreVNA-GUI/scpi.h
@@ -8,20 +8,23 @@
 
 class SCPICommand {
 public:
-    SCPICommand(QString name, std::function<QString(QStringList)> cmd, std::function<QString(QStringList)> query) :
+    SCPICommand(QString name, std::function<QString(QStringList)> cmd, std::function<QString(QStringList)> query, bool convertToUppercase = true) :
         _name(name),
         fn_cmd(cmd),
-        fn_query(query){}
+        fn_query(query),
+        argAlwaysUppercase(convertToUppercase){}
 
     QString execute(QStringList params);
     QString query(QStringList params);
     QString name() {return _name;}
     bool queryable() { return fn_query != nullptr;}
     bool executable() { return fn_cmd != nullptr;}
+    bool convertToUppercase() { return argAlwaysUppercase;}
 private:
     const QString _name;
     std::function<QString(QStringList)> fn_cmd;
     std::function<QString(QStringList)> fn_query;
+    bool argAlwaysUppercase;
 };
 
 class SCPINode {
diff --git a/Software/VNA_embedded/Application/Drivers/USB/Core/Src/usbd_desc.c b/Software/VNA_embedded/Application/Drivers/USB/Core/Src/usbd_desc.c
index 7535574..72c129b 100644
--- a/Software/VNA_embedded/Application/Drivers/USB/Core/Src/usbd_desc.c
+++ b/Software/VNA_embedded/Application/Drivers/USB/Core/Src/usbd_desc.c
@@ -63,10 +63,10 @@
   * @{
   */
 
-#define USBD_VID     					0x0483
+#define USBD_VID     					0x1209
 #define USBD_PID_FS     				0x4121
 #define USBD_LANGID_STRING     			0x0409
-#define USBD_MANUFACTURER_STRING    	"STMicroelectronics"
+#define USBD_MANUFACTURER_STRING    	"LibreVNA"
 #define USBD_PRODUCT_STRING_FS     		"VNA"
 #define USBD_CONFIGURATION_STRING_FS	"CustomUSBDevice Config"
 #define USBD_INTERFACE_STRING_FS     	"CustomUSBDevice Interface"