Android Question B4A Designer don't save layout anymore


Yesterday i opened B4A to modify a project and i notice the UI of B4A was resetted. So i reimposted the theme and the layout of the windows (logs, files, lib, ecc); i tried to close and open again and the setting was saved.
When i opened the Designer the UI was also resetted, so i reimposted all the windows, but insetead of keep the position the designer always reset the UI when i open it.
I try to reinstall B4A to the newest version (11.80) but the problem of the designer remain.

So, anyone knows which files manage the layout? Maybe i can check if it has any problem
Any suggestions are welcome