Koreader don't see hidden directories

Hello,

I have a Kobo H2O 2 and installed Kfmon ( KFMon-v1.2.14) et Koreader (v2019.03.1) on it.

I create a hidden directory (beginning by a .) to put my pdfs.

Everything was well.

But I was obliged to réinitialise the Kobo.

I reinstalled Kfmon and Koreader
But Koreader don't see my hidden directory.

Do you know what is the problem?

Is it due to the update of the Kobo?

Thanks for the answer and sorry for my english