These two tutorials apply to current versions of Fritzing:
I lately learned there aren’t links to the videos in Old_Grey’s tutorial so you need to do a google search for the title and then they come up on YouTube.
The main scaling thing to watch out for is dimensions should be in in or mm not px (as Fritzing will guess at the px conversion value and often gets it wrong especially on Inkscape.)
It is also a good idea to always run a part through FritzingCheckPart.py as it will fix a variety of issues with Inkscape (and the other svg editors) that Fritzing objects to. My tutorial will point you at the graphics standards where the various requirements are specified. The templates are probably out of data, no one has had time or interest in updating them so far. If you have questions feel free to ask them here (preferably with uploading either the brokne svg, .fzz or .fzpz file depending on what you are working on!)
