Just place the ScrapIt Pro folder anywhere you'd like.
System 7 users:
If you'd like to access ScrapIt Pro from the Apple Menu just create an alias of the ScrapIt Pro application and place the alias in the Apple Menu Items folder (within the System Folder).
System 6 users:
If you'd like access to the help file from within ScrapIt Pro, place it in the System Folder.
For users of older versions of ScrapIt Pro:
You can delete the old version of ScrapIt Pro you have on your hard drive and replace it with the new version. All old settings should be remembered and all scrap files will remain the same.