Alright, I tried installing TS3 Base Game after a few months of it being off my computer. So, I install both it and EADM. I open the launcher and patch my game to 1.22.9.0110xx.
After around an hour of installing, I try to open the launcher to get the error message: "There was an error during startup. See the Log for more details." I uninstall it, reinstall it, and choose not to download EADM and find the more recent Origin instead. Same thing, didn't work. Then, I uninstall, Reinstall, don't download any form of EADM, and decide to see if the base game runs if i don't patch it. It did, ran perfectly.
So, I decided to patch it manually from the Sims 3 website. Once I downloaded it and installed it, got the same "error during startup" message.
I haven't even got around to try and download my World Adventures EP yet. Mind you that this is only the new patch that doesn't work. If anyone could help, that would be greatly appreciated.