Win7 is fine, so it must be W10.
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Hello Old_Grey,
I know now how to do it best, so that you do not get double MINE-Sotimente.
My advice:
Do not pull any parts into the MINE range. This can be imported badly because it is a standard assortment. Then you have quickly again 2 same assortments!
The following is easier: Create your own assortment. This is where you pull your desired parts from the existing Fritzing assortments. Then you import other parts into your own assortment. Then you export the assortment. Then close Fritzing without saving files !!!
Then delete the folder C: \ Users \ username \ My files \ Fritzing.
Start Fritzing and import your own assortment. An assortment with its own name is created automatically and the parts are imported.
Finished.
Works perfect.
greeting
wwissen