diff --git a/res/freedesktop/com.solvespace.SolveSpace.metainfo.xml.in b/res/freedesktop/com.solvespace.SolveSpace.metainfo.xml.in
index 3e88165..0479aae 100644
--- a/res/freedesktop/com.solvespace.SolveSpace.metainfo.xml.in
+++ b/res/freedesktop/com.solvespace.SolveSpace.metainfo.xml.in
@@ -19,7 +19,7 @@
       SolveSpace is a free (GPLv3) parametric 3d CAD tool. Applications include:
     </p>
     <ul>
-      <li>Modeling 3d parts — draw with extrudes, revolves, and Boolean operations</li>
+      <li>Modeling 3d parts — draw with extrudes, revolves/helix, and Boolean operations</li>
       <li>Modeling 2d parts — draw the part as a single section, and export; use 3d assembly to verify fit</li>
       <li>Modeling 3d-printed parts — export the STL or other triangle mesh expected by most slicers</li>
       <li>Preparing 2D CAM data — export 2d vector art for a waterjet machine or laser cutter</li>
@@ -31,6 +31,34 @@
   <url type="bugtracker">https://github.com/solvespace/solvespace/issues</url>
 
   <launchable type="desktop-id">@DESKTOP_FILE_NAME@</launchable>
+
+  <screenshots>
+    <screenshot type="default">
+      <caption>Main window with an empty document</caption>
+      <image>https://solvespace.com/pics/window-linux-main.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Property Browser with an empty document</caption>
+      <image>https://solvespace.com/pics/window-linux-property-browser.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Viewing and editing constraints on a model</caption>
+      <image>https://solvespace.com/pics/front-page-pic.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>3D view of a stand made from notched angle iron, from the "ex-stand" project</caption>
+      <image>https://solvespace.com/pics/ex-stand-detail.jpg</image>
+    </screenshot>
+    <screenshot>
+      <caption>Dimensioning a 2D sketch for a case for a printed circuit board, from the "ex-case" project</caption>
+      <image>https://solvespace.com/pics/ex-case-outline.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Showing tracing of Chebyshev's linkage, from the "ex-chebyshev" project</caption>
+      <image>https://solvespace.com/pics/ex-chebyshev.png</image>
+    </screenshot>
+  </screenshots>
+
   <provides>
     <mediatype>application/x-solvespace</mediatype>
   </provides>
@@ -38,6 +66,19 @@
   <content_rating type="oars-1.0" />
 
   <releases>
+    <release version="3.1" date="2022-06-01" type="stable">
+      <description>
+        <p>Major new stable release. Includes new arc and line length ratio and difference
+        constraints, comments associated with point entities. Adds "exploded view" to sketches,
+        and support for displaying measurements in "feet-inches". Adds a pitch parameter to
+        helix extrusions. Allows use of Point and Normal to define a new workplane to sketch in.
+        Adds live updating of Property Browser while dragging the sketch, and active links for
+        all points, normals, and vectors in the Property Browser. Adds the ability to link STL
+        files into a model. Includes a variety of UI improvements. Speeds up complex sketches
+        by up to 8x and doubles the maximum unknowns.</p>
+      </description>
+      <url>https://github.com/solvespace/solvespace/releases/tag/v3.0</url>
+    </release>
     <release version="3.0" date="2021-04-18" type="stable">
       <description>
         <p>Major new stable release. Includes new intersection boolean operation,