This crash is repeatable. Open up Collections in a floating window or as a tab. Remove the text "Unnamed Collection" and close the window. My Logos 4.2 crashes every time I do this.
I've attached my log file
2046.Logos4Crash.txt
From Windows 7:
Problem Event Name: CLR20r3
Problem Signature 01: logos4.exe
Problem Signature 02: 4.20.4.8289
Problem Signature 03: 4d069922
Problem Signature 04: Libronix.Utility.ViewModels
Problem Signature 05: 4.20.4.8289
Problem Signature 06: 4d069866
Problem Signature 07: 22c
Problem Signature 08: 18
Problem Signature 09: System.ObjectDisposedException
OS Version: 6.1.7600.2.0.0.256.48
Locale ID: 1033