If you go to section 11.33 of the user guide, there is a paragraph there that will show you how to just use descriptors instead of a metronome mark.

In the user guide section 11.33 has the rit./accel./metronome part. The only thing...it states: where it says " add a metronome mark" Item 6. it says to either click outside the metronome window or press enter. When I click, I get a fatal error and a bug report window pops up. So hit enter...