V1.0 (19) - grant permission for folders every time I use the folder

[masterjp]

I converted a jpeg file with xnview mobile and choosed a destination folder on my device.
I grant xnview the read/write permission for the destination folder.
The conversion worked perfect.

After that, I converted a further file to the same destination directory.
I must grant the same permission for the same destination folder again.

Other apps save the permission and do not ask again.
Is it possible to improve this behaviour? Thank you.