Hay, now Rocket 3F, has Bridge to Blender! So you can exchange you models between Rocket 3F and Blender.
Check it:
https://www.rocket3f.com/kunena/updates/5424-version-1-7-8
Hay there is some Competition in Creases are on Rocket 3F site, it is possible to win Pro version:
https://www.rocket3f.com/kunena/news/5368-win-rocket-3f-pro-version-crease-tools