I terminated an account and I think was better I had suspended that account. So I recreated the account whis same username and password. My question: can I use Virtuozzo backup to reinstall all files and configs?
Virtuozzo doesn't run under any hosting control panel--it sits above pretty much everything except the kernel. If the feature is there it's probably been disabled to discourage excessive disk thrashing, but support would probably be able to do it for you.
In general, this is not something that we offer. We can try to accomplish such requests within 24-48 hours but only in cases there is pretty much no possibility to restore the whole VPS for whatever reason. There is a chance that we'll implement some sort of nominal fee for partial backup restoration in the future and, as such, will be forced to perform such (rare) requests faster but as of today we cannot guarantee any completion timeframe for manual/partial files restoration and, as I already mentioned, we do not really offer this service.
So the backups there are for the customer to use without support and its a one shot thing (whole VPS is restored)?
Also incremental is obviously changes since last backup, so can't really be used for full restore I guess? if thats the case they are not of much use in case of disaster.