DTweak

I think most people are still using XP (never upgraded to Vista), or were using Vista and have upgraded to Windows 7.

If not all windows versions then at least start with XP and go through Windows 7. Creating a separate application for each version of Windows is stupid.

this makes the software usable on dual boot systems

show users what this program is doing [please see the #13 comment]. Add VISIBLE methods of using backups. This is a program that "everytime knows better" [even if doesn't] like the autocorrection in Office that makes every letter after dot big. I...

Add the show method, because I have had problems with registry cleaners making my legit software not working. Support for all Operating Systems, well that is just common sense :) Show info for why the registry key can be deleted, makes doubtful...

Should add a kind of Help button where there will be mentioned how to use each section of the software in details like a tutorial. If anybody don't know how to use a software then it becomes needless to him/her. The interface of DTweak for Vista...

Add also the HIERARCHICAL system in Registry 'Repair' module that show importance of deleting/fixing that keys. Allow also user to select all or only select appropriate keys [expert users]. Do that like in popular Anti-Malware programs, where you...

Many people know about TweakUI, which modifies system features so that they improve various factors. Most people would probably refuse to pay 30$ for a 2003/XP/Vista/7 version.

sell a developer or administor version that includes all versions to be used across networks.