Version 3 has been working fine with me on a Windows 7 system, however version 5 causes problems.
After installation when opening Explorer, hovering the mouse over the filenames does not give me any info like attributes or the number of Rebit backups. Rightclicking the mouse on a file does not open the context menu but causes Explorer to stop responding.
Removing version 5 solves the problem. With reinstall, the problem is back again.