NecroDM

I used 7-zip to open the installer, extracting to a folder it'll ask if you want to replace files since it reads the 64bit and 32bit as being in the same folder. Say yes to replacement and you'll end up with the 32bit install

No problem, let me know if you need me for trying out 64bit test builds since it might be hard for you to replicate this issue without the same hardware. Also in the meantime would it be possible to release the 32bit versions separately for future versions as a workaround?

Update: I was able to extract the 32bit binaries from the 3.5.0 installer and it works without issues with JackRouter so the problem lies somewhere with the 64bit version of Jamulus, which is unexpected since it's the only application that's not 64bits

I'm also having the same issue, i'm unable to run any Jamulus version > 3.4.4 with JackRouter Asio driver. I also have a focusrite interface - scarlett 18i20 1st gen and i've updated to the beta drivers which fixed the buffer size issue, however Jamulus still doesn't even run (no error messages at all with version 3.5.0). Running windows 10 64bit with jack also 64 bit.

I'm also haveing the same issue, i'm unable to run any Jamulus version > 3.4.4 with JackRouter Asio driver. I also have a focusrite interface - scarlett 18i20 1st gen and i've updated to the beta drivers which fixed the buffer size issue, however Jamulus still doesn't even run (no error messages at all with version 3.5.0). Running windows 10 64bit with jack also 64 bit.