Fix deletion, delete from list, improve patch detection

GCMM/MainForm.cs

@@ -250,6 +250,8 @@ You may also want to verify the game's files by right clicking the game in Steam
                 return;
             if (MessageBox.Show("Validating the game's files is useful if the game doesn't start even without mods. Make sure to click Refresh once Steam finished verifying the game. The Steam window that shows the progress might open in the background. Note that you will need to patch the game again using the Play button in order to use mods.\n\nContinue?", "Verify game files", MessageBoxButtons.OKCancel) == DialogResult.Cancel)
                 return;
+            string exe = GetExe();
+            File.Delete(GamePath($@"\{exe.Replace(".exe", "")}_Data\Managed\IllusionInjector.dll")); //Used to check if game is patched
             if (Environment.OSVersion.Platform == PlatformID.Win32NT)
                 Process.Start("steam://validate/1078000/");
             else

GCMM/MainModInstaller.cs

@@ -122,22 +122,35 @@ namespace GCMM
 
         public void UninstallMod(ModInfo mod)
         {
-            LoadFileList(mod);
-            if (mod.ModFiles.Count == 0) //A single DLL
-                File.Delete(GamePath(@"\Plugins\" + mod.Name + ".dll"));
-            else //A ZIP
+            try
             {
-                foreach (string file in mod.ModFiles)
+                LoadFileList(mod);
+                if (mod.ModFiles.Count == 0) //A single DLL
+                    File.Delete(GamePath(@"\Plugins\" + mod.Name + ".dll"));
+                else //A ZIP
                 {
-                    File.Delete(file);
-                    var parent = Directory.GetParent(file);
-                    if (!parent.EnumerateFiles().Any())
-                        parent.Delete(); //May delete the Plugins dir if empty
+                    foreach (string file in mod.ModFiles)
+                    {
+                        File.Delete(file);
+                        var parent = Directory.GetParent(file);
+                        if (!parent.EnumerateFileSystemInfos().Any())
+                            parent.Delete(); //May delete the Plugins dir if empty
+                    }
+                }
+                File.Delete(mod.Name + ".json");
+                mod.Version = null; //Not installed
+                if (mod.Author != null)
+                    AddUpdateModInList(mod); //Update list
+                else
+                {
+                    mods.Remove(mod.Name);
+                    modlist.Items[mod.Name].Remove();
                 }
             }
-            File.Delete(mod.Name + ".json");
-            mod.Version = null; //Not installed
-            AddUpdateModInList(mod); //Update list
+            catch (Exception e) when (e is UnauthorizedAccessException || e is IOException)
+            {
+                MessageBox.Show("Could not remove mod files! Make sure the game isn't running.\n" + e.Message);
+            }
         }
 
         public async Task UpdateAPI()

GCMM/MainModList.cs

@@ -175,12 +175,17 @@ namespace GCMM
 
         public void CheckUninstalledMods(HashSet<string> installed)
         {
+            List<string> delete = new List<string>();
             foreach (string name in mods.Keys.Except(installed))
             {
                 var mod = mods[name];
                 mod.Version = null;
-                AddUpdateModInList(mod);
+                if (mod.Author != null)
+                    AddUpdateModInList(mod);
+                else
+                    delete.Add(name);
             }
+            delete.ForEach(name => { mods.Remove(name); modlist.Items[name].Remove(); });
         }
     }
 }

GCMM/MainPatcher.cs

@@ -30,12 +30,12 @@ namespace GCMM
                 playbtn.Text = pnp;
                 return GameState.NoPatcher;
             }
-            if (gcipa.Updatable)
+            if (gcipa.Updatable && !(gcipa.Version == new Version(1, 0, 0, 0) && gcipa.LatestVersion == new Version(4, 0, 0, 0)))
             {
                 status.Text = "Status: Patcher outdated\nClicking play will update it";
                 playbtn.Text = pnp;
                 return GameState.OldPatcher;
-            }    
+            }
             string nopatch = "Status: Unpatched\nClicking Play patches it";
             string gc = GetExe().Replace(".exe", "");
             string backups = GamePath(@"\IPA\Backups\" + gc);
@@ -54,7 +54,8 @@ namespace GCMM
             }
             if (File.GetLastWriteTime(GamePath($@"\{gc}_Data\Managed\Assembly-CSharp.dll"))
                 > //If the file was updated at least 2 minutes after patching
-                Directory.GetLastWriteTime(backup).AddMinutes(2))
+                Directory.GetLastWriteTime(backup).AddMinutes(2)
+                || !File.Exists(GamePath($@"\{gc}_Data\Managed\IllusionInjector.dll")))
             {
                 status.Text = nopatch;
                 playbtn.Text = pnp;
@@ -89,7 +90,6 @@ namespace GCMM
                             EndWork();
                             return;
                         }
-                        string releases = "/api/v1/repos/modtainers/GCIPA/releases";
                         this.status.Text = "Status: Patching...";
                         using (WebClient client = GetClient())
                         {