I assumed the whole time the installer is just copying files. I have installed/reinstalled using the same antivirus as before. I use Bitdefender and I have disabled it and cleaned out the windows temp folder to no avail. However, I have manually deleted the files it hangs up on during the install and was successful with a couple of installations. The files the installer was getting hung up on are, FSdt_install_guide.pdf, all the .lw.xml airport files in the Couatl folder, and the ShortcutEditor files in couatl>wx>lib>agw>data. If I delete those the installer will complete. It seems after the FSDT updater runs it adds the files again, though I'm not sure in which order. I have to go through this step in order for it to install correctly.