OK, first let me some I really like this app. I ran it some time back with out issue. i don't know if this is a different version or the same but I downloaded it again this time.
I am pinging one IP, no problems. I right click on "Workspace" and "add host" and added the another IP. If I right click and start to select Ping, I get this error message every time it attempts to ping. i can't do anything but kill it using task manager.
Title : Update Ping Results
Error occurred while updating ping results.
The given key was not present in the dictionary.