Updated the package as follows (see first post for details):
Moved the registry entry for the plugin directory/directories to from HKLM to HKCU. This should fix the issue reported above by minaust. I tested this on XP64. Let me know if there are problems with Win7/8.
Added an option to specify custom plugin directories for 32 and 64 Bit versions of Avisynth. Note that if you use the custom option,
all 32 Bit versions of Avisynth will use the same plugin directory. This could lead to problems with v2.6 plugins in combination with a 2.5 Avisynth. So, you need to know what you're doing.
