Yes, the behavior of the Aux switch changed from 4.5.0[4] release to the current release. Here’s the story:
In the 4.4.6[0] and 4.4.6[1] bams, the increment and decrement preset functions that can be assigned to aux switches or MIDI cc messages would increment and decrement presets but leave them in a pending state. In 4.5.0[4], the increment and decrement preset functions would increment and decrement presets and activate them, but this wasn't actually an intentional change and it made some users happy while upsetting others. So, in 4.8.0[1] we went back to these functions incrementing and decrementing presets and leaving them in a pending state, and we added a new function named in the app "Left Footswitch (aka Active Footswitch)" that can be assigned to an aux switch or MIDI CC and used to activate a preset.
We have agreed amongst ourselves on adding two new functions Load Next and Load Previous in the next release, i.e. the Looper release, which will increment and decrement presets and activate them. This means users will be able to choose in the next release whether incrementing and decrementing from an aux switch or MIDI CC will activate the preset or not. Ideally, we would have added those functions in the current release 4.8.0[1], but there just wasn't enough time.
