Well I crashed the second turn in.
You are at turn 97 which isn't too far in. I would try a new game and play without mods to see if you have the same crashes. Also, do you have the patchwork mod in your steam directory or my documents. It is not recommended you modify the steam files. All mods should be in the the directory located in My Documents/My Games.
Thank you for your input Illauna! It´s appreciated.
Well I did put the patchwork mod in my steam directory ("To install the mod, first backup your English folder, then copy the downloaded files into it. If you don't have DLS's, delete appropriate DLS files. Optionally there is a mod in Mod folder, which allows you to play with limited resources.")
I want the whole patchwork, and I don´t know what the limited resources would change. I want it all 
PS: Since I bought the first game of this series before elemental was released I think I still have access to all the games. I´ve since then activated it on steam.
I´m pretty sure I could install the non-steam version from Stardock. Think that would help?
I also noticed that I have an old uninstalled copy of LH (with some left over files & folders, think it was a beta?) and also an installed version of FE from stardock. Maybe I should just unistall everything and try from scratch. But before the patchwork mod using the steam version I seldom had any crashes at all.
There are also some left over files & folders from older versions of stardock games (FE, LH, Elemental)