Revert to older app version, possible?

Is there a way to downgrade an APP to an older/previous version?

I got an update of the Aeotec app today but now 1 montion detector stopped working.
This seems a bug in the new app, there is no test app…

Is there a way to install an older version and any idea where to find the older version?

You can only go back from the test a.k.a. experimental version to the ‘live’ version, with closed source manufacturer apps that is.
Disable your auto update please I would suggest, and contact support: