hey, i have the latest version, but when i try and update a blueprint it doesn't seem to do anything,

i'm actually trying to change the bp from using blue belts to red belts as i'm not up to blue belts yet,

potential bug maybe?

Thanks for pointing it out, it seems this is due to it not correctly upgrading blueprints from the library.
If you put the blueprint into your inventory first everything should work as expected.
Unfortunately I currently don't have the time to fix this, so I hope this workaround is good enough.