08-14-2017, 07:57 AM
If it is really a problem, use a graphics manager such as XnViewMP which automatically creates thumbnails.
Then there is an option to open any image in a graphics editor, set Gimp as that editor. A quick look, it is in (xnviewmp) Tools -> Open with -> .....
Then there is an option to open any image in a graphics editor, set Gimp as that editor. A quick look, it is in (xnviewmp) Tools -> Open with -> .....