The Community is now in read-only mode to prepare for the launch of the new Flexera Community. During this time, you will be unable to register, log in, or access customer resources. Click
here
for more information.
I was in similar situation last year, but running FNMEA 15.6 on linux and wanting to go to 2019R1. There was no documentation from Flexera on this, so I opened a support case. The recommendation was to upgrade sequentially through the releases, 15....