Merge PR #1086

Author: anaisbetts

src/Squirrel/UpdateManager.ApplyReleases.cs

@@ -511,12 +511,15 @@ internal void unshimOurselves()
                         baseKey = RegistryKey.OpenBaseKey(RegistryHive.CurrentUser, view);
                         regKey = baseKey.OpenSubKey(@"SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers");
 
+                        if (regKey == null) return;
+
                         var toDelete = regKey.GetValueNames()
                             .Where(x => x.StartsWith(rootAppDirectory, StringComparison.OrdinalIgnoreCase))
                             .ToList();
 
                         toDelete.ForEach(x =>
-                            this.Log().LogIfThrows(LogLevel.Warn, "Failed to delete key: " + x, () => regKey.DeleteValue(x)));
+                            this.Log().LogIfThrows(LogLevel.Warn, "Failed to delete key: " + x,
+                                () => regKey.DeleteValue(x)));
                     } catch (Exception e) {
                         this.Log().WarnException("Couldn't rewrite shim RegKey, most likely no apps are shimmed", e);
                     } finally {