I decided to bite the bullet and re-purchased v2 from Simmarket. For making liveries, I need the full unencrypted version anyway.
I found that liveries for v1 do fit on v2, but in order to use them, you need to do some changes in livery config files. If you don't, aircraft will load with invisible interior textures (unflyable, as cockpit will also be invisible). You can fix liveries as follows (replace "YourAirline" with airline name of your texture and "CRJ_700" with CRJ_550/CRJ_900/CRJ_1000 if needed):
1) Community\[livery_folder]\SimObjects\Airplanes\Aerosoft_CRJ_700_YourAirline\model.YourAirline\model.cfg:
(do not change anything before "[models]")
[models]
exterior=..\..\Aerosoft_CRJ_700\model\CRJ700.xml
interior=..\..\Aerosoft_CRJ_700\model.interior\CRJ700_Interior.xml
2) Community\[livery_folder]\SimObjects\Airplanes\Aerosoft_CRJ_700_YourAirline\texture.YourAirline\texture.cfg
[fltsim]
fallback.1=..\..\Aerosoft_CRJ_700\texture
fallback.2=..\..\Aerosoft_CRJ_700\texture.base
fallback.3=..\..\Aerosoft_CRJ_Common\texture.base
Did a few flights and have mixed feelings. Navigation seems to be glitchy, I had it a few times when aircraft would stop following path and start to turn somewhere, including when it captured ILS localizer. Never had anything like this with v1. Also had simulator permanently freeze when I was trying to add a few waypoints inflight.