I am using windows 7 ultimate 64-bit and the prl opens fine. wonder if you have a bad download of the file.
The issue is not any of the downloaded PRL files.
The issue seems to be with the RL Editor itself, because the program crashes before I even select a file. It crashes immediately upon clicking on the Open icon or clicking on File>Open from from the main menu. So, there is something wrong with either the installation of QPST or my PC itself. I have tried reinstalling QPST, unfortunately that didn't fix this problem.


