Description of problem:

Try to launch fritzing →  complains about not being able to load parts, and in GUI you don't have any parts to pick from.

How reproducible:
100%

Steps to Reproduce:
1. open terminal, start fritzing →  see about attempts to access $HOME/bins/core.fbz and the other default part sets
2. close again and cd /tmp first → now looks for /tmp/bins/core.fbz
3. workaround: cd /usr/share/fritzing/parts/ , then start fritzing, then it can load the files (as they are in /usr/share/fritzing/parts/bins)

to fix the package:
Likely some configure flag missing that defines partsdir or similar, if such a switch doesn't exist:
replace fritzing by a shell wrapper that cd's to the expected directory first, then launches Fritzing (and also change the .desktop file to launch the wrapper, and not the uppercase Fritzing directly or add working dir to the desktop file)