From experimental version to stable version.

[bearcoco]

How do I back track from version 0.15.39 back to 0.15.37? I have checked everywhere inside the different game menus. I have the non-steam version so Im unable to easily revert back into old versions. Ive been playing with someone who has the steam version but he cant figure out how to come to 0.15.39 so there must be a way I can go back to 0.15.37 without redownloading the game because I have a massive save.

[impetus maximus]

https://www.factorio.com/download
you will still be able to load your save.

[Jap2.0]

For your Steam friend, right-click on the title in their library (in the list on the left), go to properties (I think that's what it's called), go the the betas tab, and click 0.15.x or 0.15.39.

[impetus maximus]

unless you have a Razer keyboard that supports it, there is no reason to update to 0.15.39

[Jap2.0]

Compatability for multiplayer, I assume. I'd think they'd be able to add support between those versions because there weren't any changes, but it's probably more effort than it's worth to change the version checking.