Tascam model 24 firmware 1.63 update 08.12.21

[MrFeenix]

Hi everyone just to say new firmware is here ..

F/W V1.63
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Maintenance items
- In firmware V1.62, if USB audio mode: STEREO MIX was selected, output would not be sent correctly to the computer.
This has been fixed.
- When unit settings were initialized, if USB AUDIO was set to STEREO MIX, that setting was retained.
This has been fixed.
- Operation stability has been improved.

Now that is all the information that is given so my question is .. Does this mean you now get the stereo mix as the output (Main Out) instead of using 21/22 when using a DAW? Or is this just through 1/2 as a 2 channel device?
PS There was also an earlier Update which i missed..

F/W V1.62 (No Date)
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Maintenance items
- The unit firmware has been revised to handle some IC changes.

Which again is not saying much any idea what that means??