Cant you just (on XP at least), select Windows Explorer, "Folder Options/File Types" and find "File Extension"
'AVS', click "Advanced", "Change Icon", "Browse", find "Avisynth.dll" (wherever it is located), select your
chosen icon, then "OK" and "Close".
I guess if you change avs version a lot, & havta do it every time it could get a bit tedious.
EDIT: After deleting the avisynth.dll, icon still remains, I think it goes into an Icon Cache, which is
sometimes cleared, but I cant remember under what conditions. (not affected by "Do Not Cache Thumbnails"
in folder options).
EDIT: Cant say that I've ever noticed what icon avs came up under. [I ALWAYS have it on Details WITH EXTENSIONS, except in Control Panel
or Administrators Tools [where all icons are different, no point at all in icons when a folder full of identical file types].
I tried to find similar on windows 10 (not quite as horrid as I thought it would be, but hate those damn long
timeouts when it updated to Creators Update [or whatever its called]), but seems like change file icon functionality
has died out. Seems you have to be an IT Pro to want to change file icons, here suggests using ShellExView utility.
https://social.technet.microsoft.com...orum=w7itproui