after having a break I restarted blue, but got the message:
"there was an error loading Users/janjacobhofmann/. blue/userinstrumentlibary.xml
please fix this file or remove it and restart blue"
I reinstalled blue, but no change of that message. I can not find the folder Users/janjacobhofmann/. blue/ on my Mac, so I guess there is not much I can do for now...
Any help appreciated,