Rated 5 out of 5 stars
It would be helpful to have the option to locate the message filter file in some user selected cloud location. (ex. https://drive.google.com/drive/my-drive/Tbird/<account>.msgFilterRules.dat or dropbox or OneDrive, etc.. )
This way Tbird would be using the same filters across all the TBirds one uses instead of having different filter versions at every location that are always fighting each other.
Additionally, all this BS nonsense about importing and exporting the filter.dat files would go away...