This sounds strange but I managed to get the licence to reappear in 0.94.1 after deactivating all the printers from our farm. But this required deactivating one printer, restarting, then deactivating the next printer. From there I was able to verify that I hadn't lost the licence. The software was much more responsive at this point too.
Working with our IT guy, there wasn't anything wrong with the PC. All Windows updates were correct and up to date, and we verified that all the I/O ports on the PC were working correctly. No other software issues either other than what happened to Repetier 0.94.1.
I was also able to follow your instruction to reinstall the 0.93.1 .exe without losing any data and everything appears to be working as it did before the update.
Thank you for your help. Other than the issue we had with the recently update, we really like the software.