This is the pack I'm playing on, https://www.curseforge.com/minecraft/modpacks/minecolonies-testpack-ver-1-11-2
No Optifine, or anything that's not in the pack! (there is quite a lot of mods in the pack though =P)
Also, because I don't know if it means anything, or what any of the stuff inside the folders mean, should I have multiple "mw" folders inside the "null" folder? It doesn't seem to have multiples inside any of the other saves I have - admittedly though, in none of them have I gone madly out exploring yet either! Inside the server "null" I have mw0,0,3 - mw-3,0,2 - mw-3,1,2 - mw-4,0,-4
I was noseying through the folders hoping I could find images to cobble together =P I see that won't work though! =D
*edits* Also, I don't know if this makes any difference to anything, but I have two game accounts, and log into both of them on the same server at different times - it doesn't seem to me like it's saved per user, rather is saved per server, but just in case, thought I would mention it!