As I suspected:
//-------------------------- 10/14/2011 -- 13:08:23 -----
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Blockland v19
You are in the directory for an old version of Blockland. Perhaps UAC was dumping a bunch of files outputted by the game somewhere in your Documents and you found that instead by accident.
Start Blockland, hit the ~ to open your console, then scroll up to the top.
After the Input Init section, 2 lines down from where it shows the Blockland version, it should say "Profile Path: So-and-So."
That is where the game is running from, so navigate there and install it in the appropriate Add-Ons directory.