Should be compatible with older versions of the painting mod (https://github.com/sfence/painting/releases/tag/2.0.0 and https://github.com/sfence/painting/releases/tag/0.9.0). ***But before updating, I highly recommend making a backup of the world. ***
Chat commands painting_export, painting_export_tga and painting_import can be used to save paintings into files or import them from files. It requires paintint_export or painting_import privilege.