We are moving Reckon Accounts from a local PC to a Windows 2008 R2 Server. We have successfully installed Reckon Accounts Premier 2017 on our server and can successfully open it through Remote Desktop Connection, but only as a Domain Admin. If we connect via RDP as another user, then Reckon won't load. Instead, Reckon starts to load and then fails with "Reckon Accounts has stopped working" as below:

We have followed the advice in KB4494, but we still can't get it to work.
All and any suggestions are very welcome as this is becoming a really big issue for us right now.
Cheers,
Greg
PS. Can anyone explain how to contact Reckon Tech Support? I emailed them days ago on a related matter and have not had any response.