Hallo
Wanted to go back from v3.64~1 to v3.70~23
but no firmware backup available
This would require V3.64 to be forward compatible with V3.70 which is unlokely to be the case given structural updates between major versions. Downgrading firmware often tesults in no backup to the future version.
Hi, there is no issue in switching between v3.6x and v3.7x back and forth.
What happened to @most4radler is most likely an unfinished update, that half “overwrote” the backup install.
I’m not concerned that there is a real issue here.
The incompatibility that @pwfarnell referred to is quite an exception. Happened only between v3.50 and v3.60, in the past years.