Since I'm inspired by the Apple Mac concepts a lot, I'm careful that our applications are similarly independent than Mac apps; users should be able to move them etc..
Therefore, FileAlyzer.exe and UnzDll.dll are the only files you need to replace with the 1.1 version. No system drivers etc. are in place. The only bad thing is that 22 years later, Microsoft still hasn't got a proper alias manager, so you'll have to use regedit. Well, or lets say that it can't harm. Open regedit, then navigate to HKEY_CLASSES_ROOT\*\shell\. There, delete the subkey named filealyzer.
There's another file you may remove, it's not related, but belongs to FileAlyzer as well; go to C:\Documents and Settings\Username\SendTo\ and delete the FileAlyzer link there as well.