OK, first we should find out what is being scanned (if anything).
Please, go to the program settings, turn on the creation of the report file and let everything (even OK files) be included there. Then, scan the folder again using Simple User Interface. When the scan seems to be frozen, check the end of the report - what does it show there? If you wait for a minute, does the report change?

Also, how big are those smallville episodes?