I have also just had this same problem happen to me this morning when I started up my workstation.
Last night when I shut down my computer after an evening in the studio it crashed to the Windows Bluescreen error while windows was shutting down. This is unusual, but I put it down to the fact that I was messing heavily with a lot of MIDI apps last night. During that session I had also reconfigured BMT Virtual Ports and BMT had complained about not being able to close and open ports properly so things were in a little bit of a state. I didn't think much of it, my computer Bluescreens about once a week due to MIDI issues...
This morning, when I launched BMT the splash screen showed (it is usually switched off) and then a dialogue popped up saying that it was going to reconfigure the Virtual Ports, and I clicked OK. Then it showed a dialogue saying that the BMT settings file was corrupt.
I then opened the main BMT window and it was like opening BMT for the first time. There was only 1 Virtual Port, and the selection and routing of MIDI ports was all reset to nothing
Then I tried to load my project and I also got the message “This project file is not compatible with this version of MIDI Translator. Please try to get an updated project file.”
I don't have any backups, but I have only just started using BMT and I only had 2 translators which I could remake quickly. so this is no terrible loss, but it is very concerning.
Why does this happen? Is file corruption with BMT a common problem?