Hi Warren,
This is Andrej, I am part of the team working on ATS. ATS desktop recorder is having some problems with the Chrome web store and that is related to this issue. We are working to resolve the problems as fast as possible and will probably release a new version soon. In the meantime, we advise you to use the web recorder as a temporary workaround.
If you encounter any issues we would appreciate if you submit a support request to Mendix in addition to asking in the forum.
Regards,
Andrej