I tried today an uprade to new firmware (from 3.0.0 to 3.0.1) - was suggested in interface.
Upgrade finished with a message about a disabled webinterface (?) (do not remember in detail).
I have seen that still 3.0.0 was running and wanted to restart Z-Way - but in /etc/init.d/ was no more z-way-server command

So a restart would not be possible more.
I have killed the running process and tried to reinstall manual via console the current version.
Had to use apt-get remove and purge for removing old app. (there were no productive data inside, it is a review enviroment only...)
After that was installed the current version at new - but again without the start/stop script - AND: without any files in /opt folder !!
Have no running Z-Way in this time - any idea??
So I suggest to be very patient while updating, not sure why this happen.
Michael