Another Major Adobe Failure

Went to update a plugin for Photoshop via ccx file apparently managed through Unified Plugin Installer Agent through Creative Cloud.  It would not install.  Tried all the remedies I could find listed.  Nothing worked.  Attempted running the UPIA from the command line and it returned a -410! error/status message.  Of course, searching for some insights online turned up nothing.  The supposed alternative is to uninstall everything and reinstall everything.  An absolutely ridiculous approach on many different levels.  Curious if anyone has any ideas about what might be able to address this problem.  As it stands now, I have a commercial plug in I can’t use.  Considering all the other problems and indifference to customers that Adobe has demonstrated over the last few years, seems that if I am going to have to start over ever quarter with software that is not only invasive but constantly being updated an alternative should be pursued.  I have used PS since the 90’s.  Would hate to change from an experience perspective but while features continue to grow, basic functionality is waning significantly.