I know nothing of this protection program, but it appears to me that if "the program can run but users not access the folder", you mean that the folder becomes READ ONLY as far as Foxpro is concerned, but the users will have to access it to start the program.
Hence the application can write nothing to this folder, i.e. no temporary files , no FOXUSER resource file, no database files etc
If you can write your application to a CD and successfully run it from that, then it would appear you can lockup your folder on the main hard drive and expect it to work.