Keeps reverting back to trial version

I have installed newest version on the marketing PCs and installed the license file three times now. Every few weeks they try to use it, it says it is a trial version and has expired, so I have to uninstall and reinstall as admin, then put in the license file and it works for a while again. Need this solved as soon as possible. WIndows XP Pro...newest downloaded version...user is not a local admin.
What do I do? No time to keep fixing this.

Craig Bricco
IT Manager

Hello ..

I have answered your questions by email.

SmartFTP doesn't revert back to the trial version unless you delete the license key file.