Ran a script in xubuntu and my display crashed. Can someone advise on how to reverse it?

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http://askubuntu.com – I have a script I found a while back to speed up installing Minecraft... for my kid... Anyway, I recently changed to Xubuntu and figured the same script would be ok, not taking into consideration the different desktop managers. When i ran the script, "The application Desktop closed unexpectedly" and now i just have a grey desktop. Im running xubuntu 12.04 64 bit with an ati graphics card and ati drivers. If any other info is needed please ask away. I hope someone knows how i can reverse the script (below). Thanks. echo -ne "writing bin shell" # this writes a seperate shell script in (HowTos)