We are already working on this bug - which appears to be in the audio engine I am using.
If nothing helps, please revert to v18.104.22.168:
Download the zip file from the below link and install it manually:
http://www.proppfrexx.radio42.com/downl ... 301112.zip
To do so:
- close any ProppFrexx application
- make a backup of your ProppFrexx installation folder (e.g. C:\Program Files (x86)\radio42\ProppFrexx ONAIR\3.0)
- unzip the zip content to your ProppFrexx installation folder
- this should overwrite all existing files in there
- restart ProppFrexx ONAIR
Let me know, if that solved your issue.