Can't Import data from *.rmtree to Personal Historian

I Can’t Import data from *.rmtree to Personal Historian. I recently got PH3. I tried to import from my RM8 file with .rmtree extension. It didn’t allow me to find or import it. Help

Personal Historian will need an update to import the .rmtree file extension. Instead use the GEDCOM File import option in RootsMagic 8. Inside of RootsMagic 8 go to File, Export Data, GEDCOM to create the file needed to import into Personal Historian.