There is a workaround to use Origin without being forced to migrate to the EA app. Follow the steps here. Though, I am not sure if this will fix the crashes in the game itself.
Sorry for the late reply Holger1405. I've managed to find this and similar posts on my own, but wanted a more permanent solution and I believe I found one.
I needed to turn back on the in-game overlay (top left tree bars menu > settings > app > Game overlay).
ME1 should check cloud saves (for me this can take up to five min, usually less than a min), ask for admin privileges and launch.
The EA App seems to be a bit moody, so if EA App disappears andd ME1 splash screen doesn't come up wait a bit, open task manager find masseffect.exe if uses like 0% of CPU kill it, then kill activation UI (32-bit) this should bring back EA App to screen and let you try launching ME1 once more (you may be prompted wit some “couldn't sync cloud data”). - I don't know why this happens. Mostly once right after launching EA App, even if I wait for couple of minutes.
If anyone have additional questions please ask.
