Looks like you're right, MW. Running StoreItAllSetup.exe without running the other two did install StoreItAll on my Vista box. I wonder why PCMag's description says "requires .NET", implying that all platforms need to install it.
Anyway... I ran the freshly installed StoreItAll to give it a test drive. First two things I noticed: When entering data for a credit card, there's a field named "CW". What's this, I wonder, Googling as quick as my fingers can fly. Turns out that CW is a misread of C V V, which is another way of saying it's the CSC, the 3- or 4-digit Card Security Code.
Second thing: the last data field in the new record is for "Notes". I entered some information, then saved the completed record. I can now view or edit the record... except for the data in the Notes field, which I can't find anywhere. This is not just not useful, it's annoying.
Together, the application's Credit Card, Documents, Notes and Password data types might make the app work as a repository of Household PIM data, but I think its usefulness will be a highly personal judgment. So far, I'm not too optimistic. (But then, living through more than 3700 Mondays can make anybody cranky and irritable.