Unable to load preference pane
TCPBlock and OS X 10.9

Comments associated with the last TCPBlock blog update suggest there may be problems with OS X 10.9, Mavericks, and tools like Clean My Mac.

Console

Use the Console.app utility included in Mac OS X to look for error messages. Console.app is located in: /Applications/Utilities

With Console.app running, try opening TCPBlock preference pane again. You will likely see a little flurry of messages.

Possible problems include the preference pane being built for 32-bit Macs only, and missing frameworks or dependencies.