If you have some default options that you want to have as the initial settings every time you open F-Engrave you can do the following:
1. Open F-Engrave
2. Change the settings to the settings you want to be the defaults
3. Select [File - Save G-Code File]
4. Save the file to config.ngc in you home directory (the default save location)
Every time you open up F-Engrave it will load the settings from that file.
Good Luck,
Scorch
Additional Notes:
For you old unix people the file location ~/.fengraverc also works
This process will not change the default save location for .ngc files