Our IT department doubts with some evidence that STAAD crashes -that are occurring a lot- are the reason behind many files and folders disappearing without any logic reason. This happened to many PCs & Laptops. The files show next on the recovery tools as being deleted although none of us deletes anything.
Can you check for a crash report at
C:\Users\<user.name>\AppData\Local\Bentley\Engineering\STAAD.Pro CONNECT Edition\CrashReports
Please attach the crash report here.