I has a quick look over at KVR (I will be disinfecting my soul later today).
There's a couple of threads about the full version: https://www.kvraudio.com/forum/viewtopic.php?t=582388 and https://www.kvraudio.com/forum/viewtopic.php?t=587996 without any negative feedback (which is a shocker for KVR).
The company appears to have some affiliation to/agreement with Plugin Boutique - all sales and support are through them.