You would think a font manager would like you do something as simple as upload a .woff and assign it a css rule file but that is not the case with fontpress. It features are overly difficult to accomplish using anything other google or adobe web fonts.
You can't just simply upload a .woff file. nooo... that would be to simple.
But you can upload a cufon. Great..oh wait the cufon generator is no longer being supported.
Okay...next option font-face package?...can't use that because the recommended generator limits you to 0.4mb so I used transfonter to create the font face package. Then try to upload that into Fontpress and I get a No Font File found error. WTF
UI has great potential but plugin is a total fail in the practicality & functionality department.
Documentation is filled with a plethora of videos, but instructions in the videos are vague.
I'm sorry if you faced issues, but you didn't ask for support. I would have helped you also giving a fonf-face package to upload
Plugin is quite simple to be used, but must rely on external services to create fonf-face packages.