Oh my, x509, it appears you're back to the same situation I responded to here in a post last fall.
My first suggestion would be to follow whichever of the alternatives is appropriate from the first paragraph of that post.
My second suggestion would be to update your Support Case on the problem, but this time tell Support to tell Engineering that you'll go to Rod Harrison—CTO of Drobo and probably by virtue of that position now de-facto StorCentric "enforcer" at Retrospect formerly-Inc. Engineering—if you don't get some work-around in Retrospect Windows 16.5 (which I hear is due out around 20 September). A snail-mail address for Harrison is :
Attn.: Mr. Rod Harrison, CTO
1289 Anvilwood Ave.
Sunnyvale, CA 94089
However, if you are willing to enroll in LinkedIn—which I am not because of delete-finger tiredness—you should be able to get an e-mail address for Harrison there.
My third suggestion would be to "go with the flow", and setup the Web-based Management Console per this Knowledge Base article. Of course I haven't had to do that because, as a Retrospect Mac administrator, I've had a perfectly-adequate non-Web-based Console since I upgraded to Retrospect Mac 12 (from Retrospect Mac 6.1 on a "backup server" machine that died in 2010) in 2015.
P.S.: In response to x509's post below, I'd think "royally pissed" would be expressed by the following emoji: