Re: [PC] Possible workarounds for Mass Effect Legendary Edition launch problems.

I had the same issue - Launcher does not actually start any Mass Effect games and just goes back to launcher menu after clicking Start. Doing the "Beta: Use Unicode UTF-8 for worldwide language support" step from your post solved the issue and all launching fine now. It seems the launcher has an issue with systems whose default language is not English.

My system is Windows 10