Hi,
I have been using Fritzing for some time and now I wanted to make a new customized part.
At first things go well: I created a new part, based on a similar one that I have imported and now my new part is in the 'Mine’parts tab.
But when I want to change this newly made part I cannot save my changes. The ‘save’ option is disabled and I can only save my updated part as a new part again.
This of course leads to a duplicate part every time I want to make a change to my part.
Clearly I am doing something wrong but I can’t find out what. I hope someone her can point me in the right direction.
Nope, you aren’t doing anything wrong (other than using parts editor.) That is how parts editor works at present. In order to avoid this problem you can edit the underlying files directly as explained in this tutorial (although it is more complex)
otherwise just live with making a new part for every change.
The main issue is that each part in use needs a unique id. If you make a change to a part, and keep the same ID, it “could” break usage in a sketch that is already using the older part. Fritzing can not tell if is is safe to update directly, so it is just prevented. Which is why you have to create a new part each time.