Date protection.

Hi guys,

Can anyone can help me where i should look for removing
information about date when an program is installed?

My program is LogixPro
hxxp://www.thelearningpit.com/lp/dwnloads.htm

when you try the simple thing to reverse the date
"Clockback error" message appear and you never can restart the
program.also is debugger protected.

when i tried to delete from registry and system.dat i
almost killed my windows.

Also seems MSAgent have something to do with this.

reinstalling win each month is not an option.
so?any help plz?