I just purchased a second hand Plugiator with all of the plugins installed. I was able to authorize the factory plugins (Minimax, B4000, Lightwave) under Windows 10 and I can still use the other plug ins (yeah). I got the voucher for the extra plugins but not the authorization keys

Emails to Use Audio and inDSP go unanswered with no response. If Use-Audio is still out there please help me to register and I would be happy to re-purchase the keys for the rest of the plug ins.
In the meantime, and before the Plugiator re-boots, here are some tips and patches for using the Pro-12.
1: The Pro-12 VSTi plug in works under Windows 10 on my laptop. I only installed the VSTi plug in, the Pro-12 and SAVI host not Plug-in Manager). The VSTIi asks for the plug in on the very first launch and then correctly runs it. I cannot change from Pro-12 to any other program using SAVI Host.
My Desktop Windows 10 machine (which has Plug In Manager installed) loads only the Minimax VSTi (the first one I installed) and no other ones. This might be the Shell.dll or a registry setting.
I found it most stable to run only the host program and to connect a MIDI controller to the Plugiator's MIDI In . I sometimes get stuck notes but a push of the Plugiator's panic button stops that.
2: The Pro-12 panel for Liine Lemur works nicely. Connect the iPad or iPhone to USB and a controller to MIDI in. IOS recognizes the Plugiator!
3: I noticed that the programs and presets are CC and NRPNS. I archived the Pro-12's factory programs Using MIDI OX. Set the ports to Plugiator, Open the View...MIDI status window, clear status, and use the Numeric Knob to select your programs one at a time. The CC settings are displayed. Right click and "Save Snapshot" or File "Save Snapshot". Name it Pro-12 010 Synth Brass... Sometimes I got a sustain loop that is fixed by the panic button. It is best to remove your controller before you archive.
4: Attached are the Pro-12 programs in MIDI OX format. The others are coming. I hope this helps!
Sam in NJ USA