I put in a fix for the issue where sometimes tools could get replicated or deleted and then the upgrades couldn’t be bought again - now when you load into a session, the game will fix your inventory to make sure your tools align with your upgrade levels. This will replace deleted tools as well as remove duplicates.

Also, I added a reaction of Carbon and Sulfur Dioxide Gas that will let you restore Sulfur. This combined with the rain/snow means you should always be able to get back your Sulfuric Acid :)