Android Question My program folder deleted from an app cleaner

Hello,
I have got a problem with my apps..
My app save files (database, ini, etc) in a folder like /mnt/sdcard/RossiMario/AppName
Everything works fine but If I use the most famous app cleaner in the play store it delete the entire folder.
How can I avoid this? Many of my clients are experiencing this problem (because they use that app cleaner)

Thanks