Hi,
open C:\ProgramData\PTC\Licensing\BK390206EDSTUDENTUNICL_license.dat in Notepad and check expiration date. Student license file contains a line similar to:
INCREMENT CREOPMA_Student2 ptc_d 33.0 23-may-2014uncounted \
Student license is valid 1-year starting from its installation.
I guess you have to uninstall Creo 2.0, remove license file and install it again.
Martin Hanak