Use your 30 day trial version for as many days
Try this freeware program called setasdate. Just copy this program into the program files folder of the particular program which is running on a trial basis & set the date for the program. It does not change the system date but instead only sets the date for that particular program. My cuteftp trial showed 1 days remaining. I used setasdate program & now it is still showing 1 day remaining since the last 2 weeks. This is good if you download any Adobe softwares as they are 30 day trial softwares. But once your PC is formatted, the registry might register it as trial expired & things wont work. (P.S. wont work with trials that have expired)