how can i preserve my main folder?

in

At first I would like to say thanks to all the people working on BleachBit, it's a fantastic software
i have installed Bleachbit 0.9.5 in kubuntu 12.04. and when i want to clean a folder under >Preferences>Custom>Add-Folder. it delete all the files in the folder, but if the folder is empty, it will delete it.
how can i preserve my main folder?

Good luck to all and thank you

do not delete the custom folder itself

BleachBit version 0.9.5 does not offer offer this option through the "custom" system, so you can either wait for a future version or create your own CleanerML file.

I filed this request as #1104662, so it does not get lost.