I need help - I can't open Star Office 8 anymore on my Windows XP system

Right now, every time I open Star Office 8 on my Windows XP system, I get a message box that says "This version has expired." And that's it. I don't know what to do. PLEASE HELP ME!
[207 byte] By [djcolts] at [2007-11-25 23:05:14]
# 1
You have the trial version (90 days)?Try changing the system-date backwards. If SO starts, which date is shown in the titlebar?If SO doesn't start after this, try a repairinstallation.
JoLatt at 2007-7-5 17:56:41 > top of Java-index,StarOffice,StarSuite...