I found one more very nice tool named Time To Backup
(http://www.sqlly.com/download_complete.asp?file=TimeToBackup-setup.exe)

I works very well :)
But I have a question: with this tool, where or how can I specify path
to gbak.exe?
With most other IB and FB tools (IBBackup etc.) there is possible to set
gbak path. If it is built in, which version of IB or FB backup does it
create?
I ask this because I have some servers still running IB 5.6 and some
servers on Firebird 1.0.3.