This update simply brings support for 1.15. As this is a relatively minor game release, changes wise, I don't expect many issues. It should be a drag and drop with no issues in transferring images across versions.
However, there is one issue that 1.15 has presented. Unexpected behavior in the client has caused Spigot to give an unusual event causing the attempt to delete images to be cancelled before it can be processed.
I have reported this bug to Spigot and, from the response that I received, it looks like it can't be fixed at the moment by the API.
Therefore, left clicking to cancel a deletion has been removed for the foreseeable future for 1.15 and the ability to rerun the deletion command has been added in order to cancel deletions.
Despite the simplicity, if there are issues after updating to this build please let me know via a discussion post or PM and I will see about getting them fixed as soon as I can.