I just found something other than Blender that lets me change .dae into .obj, and also lets me do a lot of other stuff to the object like adding vertexes (although I don't know how yet). It is called MeshLab, and I downloaded it here.
http://sourceforge.net/projects/meshlab/files/
It is so much easier to use than Blender, and I don't need a collada plugin =D
Check out my best projects so far and please comment:
Tic-Tac-Toe 2.0 ................... http://www.alice.org/community/showthread.php?t=3548
Alice Paint ........................... http://www.alice.org/community/showthread.php?p=23408
Real-Time Clock .................. http://www.alice.org/community/showthread.php?p=12725
Maze Game ......................... http://www.alice.org/community/showthread.php?t=4301