Rafael,
I continue to get lockups: while it's initializing, programming, terminating, you name it. Resetting the emulator rarely unlocks it.
I noticed that the license status called out at the bottom of CCS window would change to unlicensed. I think I fixed this by editing /etc/udev/rules.d/70-persistent-net.rules. It had 5 eth* inferfaces listed. The one that showed up when I did an ifconfig (and the one I whose MAC address I used for my license file) was eth5. I edited the file to swap it with the one named eth0. Now an ifconfig just shows eth0 with the MAC address used for my license file.
It seemed to work better for awhile, but now is back to locking up frequently. I don't see the license status change anymore.
Mike
PS - I reverted back to CCS v5.4 because v5.5 would not build my project correctly.