We are about to switch to a new forum software. Until then we have removed the registration on this forum.
The Picking library has been updated to support Processing 3.0.
The new version (0.3.0) should show up in the Contribution Manager soon.
Here is the project link for those who would like to do a manual install: http://n.clavaud.free.fr/processing/library/picking/
Have a nice day!