STL: Allow uninstalling partially installed STL

pupgui2/steamutil.py

@@ -322,7 +322,8 @@ def remove_steamtinkerlaunch(compat_folder='', remove_config=True) -> bool:
         if os.path.exists(compat_folder):
             print('Removing SteamTinkerLaunch compatibility tool...')
             shutil.rmtree(compat_folder)
-            subprocess.run(['steamtinkerlaunch', 'compat', 'del'])
+            if shutil.which('steamtinkerlaunch'):
+                subprocess.run(['steamtinkerlaunch', 'compat', 'del'])
 
         if os.path.exists(STEAM_STL_INSTALL_PATH):
             print('Removing SteamTinkerLaunch installation...')
@@ -343,6 +344,8 @@ def remove_steamtinkerlaunch(compat_folder='', remove_config=True) -> bool:
         for shell_file in present_shell_files:
             with open(shell_file, 'r+') as mfile:                
                 mfile_lines = list(filter(lambda l: 'protonup-qt' not in l.lower() and STEAM_STL_INSTALL_PATH.lower() not in l.lower(), [line for line in mfile.readlines()]))
+                if len(mfile_lines) == 0:
+                    continue
                 mfile_lines = mfile_lines[:-1] if len(mfile_lines[-1].strip()) == 0 else mfile_lines
 
                 # Preserve any existing Fish user paths
@@ -362,6 +365,6 @@ def remove_steamtinkerlaunch(compat_folder='', remove_config=True) -> bool:
 
         print('Successfully uninstalled SteamTinkerLaunch!')
         return True
-    except IOError:
-        print('Something went wrong trying to uninstall SteamTinkerLaunch. Aborting...')
+    except IOError as e:
+        print('Something went wrong trying to uninstall SteamTinkerLaunch. Aborting...', e)
         return False