Here is what they are saying,

"...unlike the 64/32 bridge that is built into Reaper 64 for VST/VSTi, there's no bit-bridge for directx plugins - reaper x64 can only load 64 bit directx plugs, and since it's a dead format for audio fx finding any of those isn't very likely".

So why my Dxi Isotope Ozone 3, is working I don't know, since due to its age I assume it is a 32 bit, but I am not complaining. However, this may explain why no Forte Dxi. Not a big problem for me since 95% of my Reaper projects as pure audio and the little bit of Midi is easily handled by many other virual instruments (VSTi, such as the free EWQL Symphonic and Kore Player).

Dan, BIAB2024, SoundCloud Win11, i7(12thGen), 32GB, 1TB SSD(M.2 NVMe SSD), 2TB Libraries, 1 TB(WD-Black), 2TB SSD(M.2 NVMe SSD)Data, Motu Audio Express, Keystation 61, SL88 Studio, Reaper