First of all congratulations to designing and implementing such a phantastic and beautiful game! Played it since a few years now (starting in Alpha 0.20) with ever increasing admiration of artwork, historic alignment and game mechanics getting better and better with every version.
There is one small thing that I would like to suggest however:
The available mods windows (mod.io) window is obstructing the installed mods list, particularly the installed version numbers. Could it be possible to make that window moveable for checking if that particular mod version is already installed or not?
Sorry for the long text on such a minor item...