Do a virus scan cause something might screw your programs and just be sure.
And just to be sure: did you or did you not UNINSTALL and then DELETE you Blockland folder and the INSTALL Blockland again. Cause this is the solution Spartan offered.
And also when nothing helps do this:
1. Dont make any compatibilty adjustments(just let it run normally)
2.Start Blockland
3.Play the game until it crashes
4.After it has crashed, go to your Blockland directory, and find a file named console.log
5.Copy its contents(its a text file) to the forums or just upload the file itself.
6.Wait till someone who knows about these things reads that thing and finds out the problem in there.
Thats all i can suggest...