> This Font Software is licensed under the SIL Open Font License, Version 1.1.
Does this mean you can use it in commercial products?
Yes. As far as I can tell (IANAL): you can do anything except sell it directly (unmodified), modify it in any way and sell/distribute it under the name Plex, or redistribute it (modified or unmodified) under any other licence.
Yes, but you're not allowed to sell the font "by itself."
Wow, at least they included a license this time. I desperately tried years ago to get the license for the fonts shipped with the Symphony Suite, but in vain. No files, no declaration in the fonts, no answer from the IBM support.