How to save Quck Access toolbar customisation?

I am using v15 PL/SQL Developer.
I customized Qick Access toolbar for me, but sometimes my customisation disappers and the toolbar return to standard view (.
How can I save my customization so that I can quickly restore?

The toolbar configuration is stored in file "customtoolbars.ini" in directory %APPDATA%\PLSQL Developer 15 (e.g. C:\Users\<user>\AppData\Roaming\PLSQL Developer 15). You can copy this file to restore all toolbar settings.

Thanks, Marco!