Sorry to hear this. It really shouldn't be more complicated than installing, signing into PTF with your
my.avid.com email+password, and inserting UVI Workstation on a stereo Instrument/Aux Track. I'd double check that
UVIWorkstationAAX.aaxplugin is installed in
/Library/Application Support/Avid/Audio/Plug-Ins and as offered earlier... happy to share a Project with you and work on this but understand if you don't have time to troubleshoot further.