When the following operations are performed:
1) Load a saved .gde file
2) Delete the first top-level node of the tree
3) Save (causing an overwrite)
All data in the .gde file is lost! and it reduces to a
20-byte file (which represents an empty guide).
Bug exists in v1.3 and earlier.
Thanks to Djonny Stevens Abenz for
reporting/reproducing the bug.
[v1.3.1 will be released specifically to fix this bug.]