Hey,
I can happily report that with the newer version of AM (don't know if it's the latest, downloaded it around 11 hours ago) and my old config my sims unfreeze and are able to go home to sunset valley. The base camp icon in map view returned to its original green color. So far, so good.
There are however two minor issues that I came across with the older and the newer AM version. As my sims still refuse to use their incrediblly expensive car in favour of their motor bikes they brought home with them, I tried to assign them to cars. That didn't work and there wasn't even a menue to choose from. It doesn't matter which car. If I tell them to use it they do, but they can't "own" it.
To avoid that I removed the parking spots on the lot and put the cars in their inventories, so they have no other choice.
The second one is related to the "testingcheatsenabled" cheat. In my config I enabled that cheat by default so I won't have to type it in everytime. Yes, I am a lazy bum. It works just fine with the base neigbourhood, but once they reach their destinations it seems to be gone. Without AM it is possible to use the letter box in the base camp to access cheat options, with AM its only possible if I type it in manually. That is really not a problem and maybe caused by the old config. But I wanted to report it, too. Just being thoroughly.
ETA: I remembered another thing. My female teenager had her lifetime want (is that the term, I'm not sure..?) "become a Renaissance-Sim" fulfilled. She went to China and once there, it reverted to no lifetime want at all, as if she never had one. After returning home, it appeared again, fulfilled as it should have been. Any ideas to that?