GHDavis wroteLong time user... Just to go on the record, as a Software Developer, I do not like the "New" interface I have just installed. It's not a matter of getting used to the "New" thing as opposed to the "Old". I just don't like it because it's not intuitive... I may go back and re-install the original version and skip the update unless someone can give me a reason(s) to move forward with the "New" software. ...
I brought up the old and new side by side. Starting from the left side of the old window:
Old tabs 1 and 2 correspond roughly to the Software Manager and Startup Manager icons. However, the new tools have more functionality and control, once one figures out how to use it. Also, power users can turn on the "Age/Comment System" of PowerTools 2007 for one or both tools by editing certain .dat files in the Settings folder.
Old tabs 3 through 9 correspond exactly to the Registry Manager icon. For most users, the functionality is identical. Power users can turn on the "Age/Comment System" of PowerTools 2007 by editing a certain .dat file in the Settings folder.
Old tab 10 corresponds to the Registry Cleaner icon. The tabs in the new tool provide more control and functionality. For one example, the ignore words tab lets you easily specify ignore words. For another, the tool's preference saving feature lets you save different named settings. Personally, I prefer the old "raw" list format over the new "structured" tree format for presentation of results. The format is a choice you can easily make.
The Registry Compactor tool is not available in the old program.
The new Backup Tool has many features not present in the old program.
That's my take on the major reasons to move to the new program. Alternatively, you can have both available for a while while you decide.