Resistance not working correctly

I’m not the first to post this so to add to all the other complaints, the resistance is not working properly on my set up either. I have a Tacx Flux2 and I use my MacBook offline (no internet in garage). After 3 different rides, playing around with all the settings (mysteriously changed by the 7.0.5 update), the resistance is all over the place and completely inconsistent. Previously, I could not get up a 10% incline without dropping down several cogs. Now, I barely need to change gear at all. Road speed in Reactive/simulated modes changes during the ride but mainly due to the ride gradient rather than any changes to my power input. This software “update” is appalling. I want to revert back to the previous version until all these bugs are fixed, but there doesn’t seem to be any way to do this.