Hi Michael, I rolled back MOI to V4 and no problem in opening files across network. I have 2 other slave workstations 1 with win 10 other win 11 I never updated MOI on those running v4 and files open across network no problem. On the QNAP file server I havent done any firmware upgrades on that either for quite some time. For now Ill keep working in MOIv4 - maybe some security permissions as the program is beta? not sure