Turns out that simply removing the .lock file doesnt really do the trick. To make it work I have to use hamachi-init -f (force using the directory ~/.hamachi even tho it already exists).
Doing that and then removing the lock usually gets me back on line, but with 2 small problems:
- a new Hamachi IP every time. Kind of a PITA (I have to change a number of scripts)
- all this dang thing has to be done every time I reboot my Linux server. It doesnt happen all that often but still...
Im trying to find out why this happens so I can try to really fix it. None of the hints in this thread helped so far, except from my dirty workaround (with new IP at every use