Hello all. This is yet another bugfix for the previous 1.9 release candidates.
A fix in RC3 regarding removing plugins with addressings was not complete, some issues still remained.
So now this RC finally fixed it! 
Also we reduced the default CPU on the Duo X, by optimizing the CV handling and make it be quiet/silent if not enabled or connected to anything.
Please refer to the RC1 topic to read the changes made in 1.9:
Changelog for RC4:
- optimize CPU usage of CV read/write clients
- really fix removing plugins from pedalboard that use multiple CV out addressings
Here’s the manual download link:
Duo: http://download.moddevices.com/releases/testing/modduo-v1.9.0.1194-RC4.tar
Duo X: http://download.moddevices.com/releases/testing/modduox-v1.9.0.1195-RC4.tar
The upgrade procedure is explained at the top of our releases page, here:
We hope you’re enjoying your MOD Duo and/or MOD Duo X.
Let us know if you find any issues.