Compare does not work.

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Run SlimTune and specify an output file.
2. Run SlimTune and specify another output file.
3. Compare button does not enable.
4. Open Both output files.  Both windows open.
5. Compare does not enable.

What is the expected output? What do you see instead?

I expect the compare button to enable.
I expect to press the compare button and see some kind of comparison.

What version of the product are you using? On what operating system?

0.3.0 on Windows 7

Please provide any additional information below.

Original issue reported on code.google.com by cbut...@gmail.com on 28 Jan 2013 at 9:00