v1.5 crashes and quits when selecting any gemset

[DazDotOne]

Though I have been using Jewelry Box for around two years with no issues. In the last month or so I have been unable to use it for anything useful and have instead had to fall back to using the command line for RVM management.

I am unsure as to whether this issue began with an update but I first noticed a problem when I was unable to install any new Rubies (selecting any tab or, at least as far as I am aware any clickable element would cause crash-quits). I tried updating Xcode and reinstalling Jewelry Box and this did at least allow me to change tabs etc but it still crash-quits when selecting any gemset name in the Gemsets sidebar.