This is the 1.13.x and 1.14.x compatible release of ChestShop. It might be compatible with higher versions but is definitely not with lower ones! Use these builds for pre 1.13.
Please read all the notes and changes before upgrading!
This version will upgrade your item meta database (items.db). Take a backup! There might also be some errors in the conversion process which you should be able to ignore, just keep note of the...

ChestShop 3.10
A simple, yet very powerful system for making physical shops using signs and chests.