Fix for dev builds

Signed-off-by: Sebastian Malton <sebastian@malton.name>

src/common/user-store/preferences-helpers.ts

@@ -272,7 +272,7 @@ const updateChannels = new Map([
     label: "Alpha"
   }],
 ]);
-const defaultUpdateChannel = new SemVer(getAppVersion()).prerelease[0].toString();
+const defaultUpdateChannel = new SemVer(getAppVersion()).prerelease[0]?.toString() || "latest";
 
 const updateChannel: PreferenceDescription<string> = {
   fromStore(val) {