I note that the version number (8.16.0 build 3712066190) of the program used in the new Volanta integration is the same as the stand-alone version, but it exhibits a bug that was found in an older version of the stand-alone version. When exporting to MSFS, the file type is shown as *…pln (two dots), and the location used for the export does not change.
I contacted Volanta, and they said that I should contact you to see what is going on - thanks!