Which arrow script ? There are several.
Scripts go in your Gimp profile:
For Gimp 2.10.x C:\Users\"yourname"\AppData\Roaming\GIMP\2.10\scripts
A 'hidden' folder, see: https://support.microsoft.com/en-us/help...windows-10
For Gimp 2.8 C:\Users\"yourname"\.gimp-2.8\scripts
Each of these are created first time you run Gimp. If you have tried Gimp 2.10 & Gimp 2.8 there will be both. Delete the inappropriate one.
Scripts go in your Gimp profile:
For Gimp 2.10.x C:\Users\"yourname"\AppData\Roaming\GIMP\2.10\scripts
A 'hidden' folder, see: https://support.microsoft.com/en-us/help...windows-10
For Gimp 2.8 C:\Users\"yourname"\.gimp-2.8\scripts
Each of these are created first time you run Gimp. If you have tried Gimp 2.10 & Gimp 2.8 there will be both. Delete the inappropriate one.