sorry didn't noticed that the backup file is not editable. I was doing it with export file. So for wireless configuration do it like this:
1. Open terminal and type:
2. You will see the wireless configuration file under Files as wireless.rsc
3. Get the file on your local PC and edit the the configuration
4. Then from terminal type: import wireless.rsc
You can't do remote scanning if you access the CPE trough wireless because during the scanning all wireless connections are dropped.