new Firmware 11.5

[ssfas]

Just format your SD card every time you change the contents. Takes seconds and will avoid any problems.

This is a great idea. As some will know, when you delete files, they aren’t actually deleted, but hidden and are recoverable using special software, until they are overwritten. Could it be that the “deleted” config file is in some way interfering with the newly loaded file?
Can’t wait to give it a try.
BTW, do you format to fat32 or fat16, and does it make any difference?

Per Devialet, use MS-DOS (FAT)

If you use a card for a software update, delete the files and clear the trash, then put a new config file on, I assure you it will not work. Overwriting config files is not a problem, I just got in the habit of an erase, that literally takes 15 seconds.