I have run ReDem just fine on my Win 7 x64. What is the problem you are seeing?
"Just post some random unrelated text. We have members here who can help you with that." ~ Chacal "When all else fails, read the instructions... if that doesn't work either, try following them." ~ Old Prof The Grade Crossing - Atlanta North Project - Virtual Rail Creations
When you download it to a folder, you have to run it from there. I had the same problem. I D/L it to a folder them move it and it wouldn't open. I got the same error. This worked for me.