That plugin works on my system (Win 10).
Maybe you can find the reason in on of the log-files (%appdata%\VSL\Vienna Ensemble Pro\logs).

Thanks you two.  Bill, have updated iLok Manager, restarted, rescanned all plugs.  It reported only 2 did not initialize - z3ta+ (a Cakewalk Synth) and iZotope Ozone 8.  I OK'd that box and saw UVI and a load more appear in my plugin list - HOORAY!

2 seconds later, all these vanished in a puff of smoke.  So back to square one.

bbelius, thanks for that info.  Here's the offending stretches:

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FIRST SCAN - v3.02:

Creating VST Plugin: C:/VSTs/UVIWorkstationVSTx64.dll

2019-05-02 18:08:13.118 INFO  [13636] [VstPlugin::] Opening VST Plugin

2019-05-02 18:08:13.508 ERROR [13636] [VstLoader::] Error loading library: Cannot load library C:\VSTs\UVIWorkstationVSTx64.dll: A dynamic link library (DLL) initialization routine failed.

2019-05-02 18:08:13.508 ERROR [13636] [VstPlugin::] Could not load VST library

2019-05-02 18:08:13.510 INFO  [13636] [VstPlugin::] Destroying VST Plugin: C:/VSTs/UVIWorkstationVSTx64.dll

SECOND SCAN - v3.05

Creating VST Plugin: C:/VSTs/UVIWorkstationVSTx64.dll

2019-05-02 19:50:37.060 INFO  [9924] [VstPlugin::] Opening VST Plugin

2019-05-02 19:50:37.454 INFO  [9924] [VstPlugin::] VST version: 2400

2019-05-02 19:50:37.454 INFO  [9924] [VstPlugin::] Reading speaker arrangement information

2019-05-02 19:50:37.454 INFO  [9924] [VstPlugin::] Updating bus channel counts

2019-05-02 19:50:37.454 INFO  [9924] [VstPlugin::] Plugin opened successfully

2019-05-02 19:50:37.464 INFO  [9924] [VstPlugin::] Destroying VST Plugin: C:/VSTs/UVIWorkstationVSTx64.dll

2019-05-02 19:50:39.476 INFO  [9924] [VstLoader::] Unloading: C:/VSTs/UVIWorkstationVSTx64.dll

THIS LAST TIME:

Creating VST Plugin: C:/VSTs/UVIWorkstationVSTx64.dll

2019-05-02 21:07:00.520 INFO  [2416] [VstPlugin::] Opening VST Plugin

2019-05-02 21:07:00.955 ERROR [2416] [VstLoader::] Error loading library: Cannot load library C:\VSTs\UVIWorkstationVSTx64.dll: A dynamic link library (DLL) initialization routine failed.

2019-05-02 21:07:00.955 ERROR [2416] [VstPlugin::] Could not load VST library

2019-05-02 21:07:00.956 INFO  [2416] [VstPlugin::] Destroying VST Plugin: C:/VSTs/UVIWorkstationVSTx64.dll

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That 2nd time is especially odd - all seemed to go swimmingly, then it destroyed it.

"Destroyed" feels like an extremely apt word to describe what VEP7 is doing to my plugins.

Originally Posted by: bbelius

"Destroying" is a technical description from the developer for the unloading process. It does not destroy your plugins. :D

I do realise that - but its a very apt description of what I see VEP doing.  One second they're there, then BAM they get destroyed.

...to add that Support are looking at it, currently unable to replicate.  Here's a video I did for them that demonstrates what is happening my end:

https://youtu.be/lWdmgjb6uag