The Mousepad editor stores its settings in gsettings instead of a config file. The settings can be exported/imported from gsettings to share them between computers or as a backup.
dconf dump /org/xfce/mousepad/ > mousepad.settings
dconf load /org/xfce/mousepad/ < mousepad.settings
My settings
[preferences/file]
add-last-end-of-line=true
[preferences/view]
auto-indent=true
color-scheme='oblivion'
highlight-current-line=true
insert-spaces=true
match-braces=true
right-margin-position=uint32 120
show-line-numbers=true
show-right-margin=true
tab-width=uint32 4
[preferences/window]
always-show-tabs=true
client-side-decorations=true
cycle-tabs=false
expand-tabs=false
remember-position=true
statusbar-visible=true
toolbar-style='icons'
toolbar-visible=true
[state/application]
enabled-plugins=@as []
[state/search]
history-size=uint32 100
[state/window]
fullscreen=false
height=uint32 1000
left=uint32 632
maximized=false
top=uint32 769
width=uint32 1296