FC looses saved search profiles

[ci4noz]

I'm using FC donor for a long time and this problem persists through every version update.
I'm used to create and use search profiles. All saved search profiles are lost after a certain time. I can use them a few times until I open the profiles tab in the search window and I no longer see any of them (the box is empty).
It's not clear on what deletion is triggered; I don't close FC very often, they disappear even without closing it.

This is very annoying issue.
Does anyone has the same problem?

It occurs both on Windows 10 and Windows 11.