S4S Crashing After Deleting CC Files

I'm running into the problem of my S4S quitting/crashing after I delete CC. I'm using v1.3.3.1 - Apple Blossom on MAC. Thank you!

Here's the error message:
 
[v1.3.3.1] Error [MainClass.Main:0]

System.NullReferenceException: Object reference not set to an instance of an object
at S4Studio.ViewModels.MyCC.ModPackageViewModel+<>c.<get_SwatchPrototypes>b__28_1 (S4Studio.Data.IO.BuyBuild.ISwatchResource x) [0x00000] in <eced9a790f294ca685a0eccd4d198fcb>:0
at System.Linq.Lookup`2[TKey,TElement].Create (System.Collections.Generic.IEnumerable`1[T] source, System.Func`2[T,TResult] keySelector, System.Collections.Generic.IEqualityComparer`1[T] comparer) [0x00017] in <e55d0ecf073a4e6199f8b60a57166fef>:0
at System.Linq.GroupedEnumerable`2[TSource,TKey].GetEnumerator () [0x00000] in <e55d0ecf073a4e6199f8b60a57166fef>:0
at S4Studio.ViewModels.MyCC.ModPackageViewModel.get_Content () [0x0001c] in <eced9a790f294ca685a0eccd4d198fcb>:0
at S4Studio.MyCCViewController.PackageModSelected (S4Studio.ViewModels.MyCC.ModPackageViewModel& mpvm) [0x0001d] in <eced9a790f294ca685a0eccd4d198fcb>:0
at S4Studio.MyCCViewController.UpdateVisibility () [0x00006] in <eced9a790f294ca685a0eccd4d198fcb>:0
at S4Studio.MyCCViewController+<>c__DisplayClass8_0.<ViewModel_PropertyChanged>b__0 () [0x00032] in <eced9a790f294ca685a0eccd4d198fcb>:0
at Foundation.NSAsyncActionDispatcher.Apply () [0x00002] in <50ed5ddbb9844d8e9efa31d766b6f0bf>:0
at (wrapper managed-to-native) AppKit.NSApplication.NSApplicationMain(int,string[])
at AppKit.NSApplication.Main (System.String[] args) [0x00040] in <50ed5ddbb9844d8e9efa31d766b6f0bf>:0
at S4S.MainClass.Main (System.String[] args) [0x00005] in <eced9a790f294ca685a0eccd4d198fcb>:0

Does anyone know how I can fix this? Thank you so much