There was a reset on all players inventories when we upgraded to a better system and also totally reworked damage calculations. We knew we had to do this so we included a disclaimer in the game saying that "inventories might reset".
We are confident we won't reset the inventories again and this new way we store items for players is more robust and resilient to bugs.
When we released the new inventories / weapons a few days ago we noticed some problems that should be now fixed. If you are still experiencing game crashes could you include a screenshot of the crash?
Also, can we know a little more about the specs you are running the game with (Operating System, Video Card, Amount of RAM)
Thanks for your patience and supporting the development. You are a key part of this project