My friend and I were going to play some Hammerwatch, and we wanted to continue our game from where we left off, so after I launched Hammerwatch beta_1.3 on Sept.13 2014 (don't know if there are specific builds, if there are, you should be able to tell from the date) from the menu I went Multi>Load, immediately after clicking load (didn't bring me to a screen to select a save) the game crashed and an error message showed saying a log was created, here it is: