I have just released version Beta 2.00 of this plugin. This version brings support for Max 2019 as well as a handful of bug fixes and minor improvements. You can get it now on the download page.
Along with this release, I have also updated the recently-released manual to cover more of the plugin's features. If you have viewed the manual before, you may need to clear your browser cache (or ctrl+f5) to see the new version. I've reconfigured the web server so this problem shouldn't happen again with the next update.