Can I use something other than Sim Blender and the Insimenator to use this? Can I use the Sim Manipulator? Please help? 

I was wondering if somebody could help me. My computer is saving zip and rar files from this site and the sims 2 community in .efw format. I'm not sure how that happened. I was wondering if it could be because of the new virus protection I have on my computer now. But the odd thing is it saved rar and zip files from MTS2 just fine. Please help me.