Your best bet for initial support is the Radioreference Forums. If you are not currently a Radioreference user you will need to create an account and be logged in to post. And your first post(s) will be moderated.
You should search the forums for the specific issue that you need help with. If you can’t find anything relevant to your issue, you should make a new post referencing DSDPlus Public Release in the following subforum:
https://forums.radioreference.com/forums/voice-control-channel-decoding-software.26