JACK keeps me frustrated

[Tomas Valusek]

Hello,

I curse JACK - such a hostile piece of software, whose error messages 
provide no help, stops itself working after mere editing of options 
according to https://help.ubuntu.com/community/HowToJACKConfiguration 
(first example, I happen to have the same sound card).

The worst - I don't know how to return to previous working state other 
from completely reinstall Ubuntu Studio from scratch ... If only Linux 
had Restore points as WinXP does ...

Unfortunately, I'm sending this mail from Windows, which is still my 
main working OS, Ubuntu Studio didn't make it from experimentation state 
yet, so I can't provide contents of JAKC's Message Window.

I absolutely don't know what now, how to return JACK to its previous 
working state. Can anyone help me? Many thanks in advance.

Tomas Valusek