New Minecraft launcher failing to launch VIvecraft 1.7 w/FTB

[nyasara]

I use the FTB Infinity Evolved mudpack with Vivecraft. Was working fine last night. Today I try to started Minecraft and there had been an automatic update to the Minecraft launcher. The profile for Vivecraft 1.7 w/FTB is crashing out. The Vivecraft 1.11 profile is working fine.

http://pastebin.com/iS7539KC has the tail end of the output when I launch and it errors out.

[jrbudda]

Could you try installing again? there's actually no vivecraft code in that crash report its all Forge and the CoreModLoader.

[Techjar]

I also notice the word "game" on each log line. This is not normally in the output. Are you using a third party launcher? We only officially support Mojang's launcher, as trying to do anything about the various quirks of third party launchers is impossible.

[nyasara]

As I said, it appears that the vanilla Minecraft launcher has updated. I've been using the vanilla, and last night it had been dramatically updated, including launching a whole new style of independent log window. Perhaps I'm getting A/B tested or something, if you're not seeing that. I can try reinstalling tonight and will update with how it goes.

[Techjar]

Are you talking about the launcher that looks like this?

If so, that is the new launcher. I thought it worked the same as the previous one, just with a different GUI. If it is that, try the second one on the list on this page: https://minecraft.net/en-us/download/alternative

[nyasara]

Getting the old launcher, reinstalling Forge, then Vivecraft for 1.7.10+Forge, then updating the profile back to point at the FTB Infinity Evolved location has worked successfully.

Forgetting to replace my quick launch icon and having to do that all a second time when the new launcher reasserted itself was a problem but not your fault.

Thanks for all the help. You can close, though I would recommend a note on forums/instructions to let others know.