When I originally had this problem a few weeks ago, there were only two accounts on the system, one admin, which is rarely used, and one standard. Currently there are 3 accounts, one admin and two standard, with the second standard account created just for further testing and troubleshooting (i haven't used that account in days).Can you please start off by informing us how many user accounts you have on the system, how many of the user accounts are admin? If there's a way to reliably reproduce it, then we can raise an issue for the developer to investigate. I have a single account on my system.
It is a relatively fresh Win 10 Pro install, about 2 months old, nothing particularly out of the ordinary. None of the accounts were created with "Microsoft accounts", just local accounts not tied to MS.
That is interesting about the working directory. I noticed that and could not find any evidence that a folder was created anywhere under C:\Users\<username>\AppData\ . Even if worked ok, there would still be issues for some people who run multiple users on their PC. The client, when ran under the other user accounts, would not have access to the folder, only their own 'C:\Users\<username>\AppData\<etc>' folder with their own data.