Version discrepancy

[DerVVulfman]

When I downloaded RPGMaker, I saved the install on a CD, including my serial number. All I had to do to re-install was to generate a new activation code after submitting my serial number and paste the new code into the system. Even version 1.02a is still activatable (is that a word?). So if you have your original download and serial... you wouldn't need to get the trial version. There's virtually nothing different.

On the other hand, look at your project's INI file. One would have a value of
Library=RGSS102E.dll
and the other (likely) to be
Library=RGSS104E.dll

See what happens if you copy your older 1.02a project to your lappy, and changing the entry to use the newer .dll. That may do it.