Collaborator 10 and Beyond Compare 4

Recently upgraded to Collaborator Enterprise 10, and I can no longer use Beyond Compare 4 as my external diff viewer.

Attempts produce the following:  Looks like I'm missing a Jar file?  Any ideas?

ava.lang.NoClassDefFoundError: com/smartbear/ccollab/client/CollabClientInvalidInputException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.getDeclaredMethod(Unknown Source)
at com.exe4j.runtime.LauncherEngine.launch(Unknown Source)
at com.exe4j.runtime.WinLauncher.main(Unknown Source)
at com.install4j.runtime.launcher.WinLauncher.main(Unknown Source)
Caused by: java.lang.ClassNotFoundException: com.smartbear.ccollab.client.CollabClientInvalidInputException
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 6 more