Update readme with troubleshooting info.

GuitarBro · GuitarBro · commit 493e58503cdb · 2021-02-28T00:37:02.000-05:00
diff --git a/readme.md b/readme.md
@@ -6,11 +6,17 @@ Patches Unity Hub with a custom dark theme.
 
 ## Getting Started
 
+_Make sure that Unity Hub is not running in the background before running Hub Patcher!_
+
 Simply run hub_patcher.py with the path to your Unity Hub installation as the first arguement. You may have to run as administrator depending on where it is installed.
 
 Ex: `python hub_patcher.py "D:/Program Files/Unity Hub"`
 
-Note that Hub Patcher has only been tested on Windows 10. OS X and Linux may or may not work.
+Note that Hub Patcher has only been tested on Windows 10 and Linux. OS X may or may not work.
+
+### Troubleshooting
+
+If you get `PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'app.asar' -> 'app.asar.bak'` you likely have Unity Hub running in the background. Ensure the process is terminated before retrying.
 
 ### Prerequisites
 
