I am unable to reproduce the issue as of version 4.1 (latest that I am aware of) on mac.
The part:
![[Image: zpVsX.png]](http://i.imgur.com/zpVsX.png)
A model using the part:
![[Image: cm4xz.png]](http://i.imgur.com/cm4xz.png)
It did take a little while to load the first time because it tried to find an update for the part and a few subparts (some are still unofficial) and during that time the interface did become unresponsive for a few seconds, but it loaded just fine. Please elaborate on "crash" and please tell us what version/system you are running on, and what part, specifically, you have issues with.
The part:
![[Image: zpVsX.png]](http://i.imgur.com/zpVsX.png)
A model using the part:
![[Image: cm4xz.png]](http://i.imgur.com/cm4xz.png)
It did take a little while to load the first time because it tried to find an update for the part and a few subparts (some are still unofficial) and during that time the interface did become unresponsive for a few seconds, but it loaded just fine. Please elaborate on "crash" and please tell us what version/system you are running on, and what part, specifically, you have issues with.