[@TK] I tried installing 4.16 under Vista and it’s not an installer but a downloader… and failed to download so installed the offline installer from vendors site which installed but presented the SAME signature error as 4.14 did after running the 4.16 portable edition just fine… I had several older versions on that system so tried a version 3.x version and it ran without issue so have set that to autorun on the Vista server, it used same database as 4.14 did originally so no data lost and remains deluxe activated… it’s a big step backwards thanks SOS and Vladonai