I have reported on this printing problem of mine on several occasions with
no solutions offered so far.
I have read every one of them. The problem is the lack of information. There are
no comparisons from one version the next other than it does not work.
Have you compared dmesg, /var/log/messages, lsmod and lsusb? Without
any of that then solutions are difficult at best.
Applixware have you tried on the failed installs to run the app from the terminal?
That output would be helpful.
VL 7.0 is alpha even trying to consider using for a production system is not recommended.
Each version of Vector is built on its' own not from light to STD to SOHO, which is why any
output would help with a direction to go.