Okay, the creator of Bricksmith was kind enough to email me back. The library is hidden in Yosemite so you gotta download an app that makes hidden files visible.
Thanks Mr. Smith!
Here's what he wrote:
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Thanks for writing. I always enjoy hearing from people using my software!
The preferences are in /Users/yourname/Library/Preferences/com.AllenSmith.Bricksmith.plist
Thanks Mr. Smith!
Here's what he wrote:
-------------------
Thanks for writing. I always enjoy hearing from people using my software!
The preferences are in /Users/yourname/Library/Preferences/com.AllenSmith.Bricksmith.plist