You can make Juice work in Windows 7, but you need to perform the following steps.
1. Download, install, then browse to the installation folder.
2. Change the EXE compatibility mode to Windows XP SP2 [press alt+Enter, on the executable, flip to the Compatibility tab, place a checkmark in the 'Run this program in compatibility mode', then press the OK button.
3. Open Ipodder.cfg with Notepad and change the output directory from "My Documents" to "Documents" - which is found under:
4. Launch Juice.