A quick note on something I have just realised.
When you look at the mixes screen in OpenTX 2.0 there are now options in the mixes to use Ail or [I4] Ail ( the number may vary )
These are VERY different.
[I4]Ail is the aileron stick value after the rate lines have been applied.
Ail is the raw stick value. If you use Ail then your Rates Switch will not make any difference – you will always be on Full Rates. So check these settings carefully when you upgrade or if you upload eepe files from other people.
There is a useful forum post here