HIBI

This is BFD 3.5 beta, not BFD 4, correct?

This comment by Cakewalk staff below will further clarifies your view.

Does the level knob on channel 9/10 not work with USB output?

It sounds like the loopback function of the audio interface is working. If “Enable Loopback” is checked in the UR22mkII tab of the Yamaha Steinberg USB Driver setup screen, try unchecking it.

See FAQs - "What is Backstage Pass?" on the Cakewalk Sonar page.

What will be changed by step 1? (Is it mandatory?) Does step 3 simply scan without resetting?

Yes, I knew, that because it seems you were creating a folder with a different name (IK-TONEX), so my comment was not directly relevant to the problem you had. I was merely referring to what often happens with recent plugin updates in response to OutrageProductions' comment. Sorry if I confused you. Anyway, I'm glad to hear your problem has been resolved.

I am guessing that the problem may occur in the following case. If an old version "C:\Program Files\Common Files\VST3\PluginName.vst3 (actual plugin file)" is originally existed and it's already scanned with Cakewalk, and a subsequent update installed the actual plugin file "PluginName.vst3" under a folder named "PluginName.vst3", such as "C:\Program Files\Common Files\VST3\PluginName.vst3 (folder)\Contents\x86_64-win\PluginName.vst3 (actual plugin file)". In this case, resetting and rescanning the plugin may solve the problem. (Just rescanning is not enough) So, I believe the baker should review the behavior of "VstScan.exe".

Make sure you have the latest version of Command Center.

How about trying with "rick_hardy" without the "@" mark?

I don't know why, but sometimes the reactivation toast appears a few weeks after the latest version. In previous versions, it never showed up for 6 months.

I got it a few minutes ago. Did it start earlier than scheduled? (I just mistaken for an hour?)

Just to be sure, is the Alesis Multimix 4 USB FX's "EXT/USB TO MAIN" button pressed? According to the manual, it appears that you need to press that button to route the sound from the PC to the mixer.

I could only find images: https://usagif.com/gif/fan-gif-36-little-3d-fan/ Waves plugin - Fan Only for similar effect: