I CANNOT PLAY MINECRAFT

Whom have I to thank for the new launcher? Thanks for fucking up my weekend. I can't play it. Not even start it. Yes it's modded and I play 1.7.10, but who the fu.. allowed you to automatically install the launcher in alpha beta delta unproved untested version on my pc. Not even the question by start-up, if I want the NEW launcher. Repair it, now, on this weekend, not the next weeks. I am really angry and frustrated. No appologize, no comments, no information how to get back to the old launcher. I have the dam Windows 10, so no one has to pressure me to get it.