You have to first install the Inventory program so you have to find the install file and double click on it. The install file is QuickenHomeInventory.exe (and you should also have EmergencyRecordsOrganizer.exe).I have Quicken 2013 and when I moved Quicken to my new HP Desktop 64bit with Windows 8.1 - I found inventory in C:\Program Files (x86)\Quicken folder. I used this link
After it was installed, I went back and found the actual program "QHI.exe" in the programs folder and I right clicked on it and sent a shortcut to my Desktop. The data file ends in .IDB. It should be in My Documents (or just Documents) in the Quicken folder. Or search for it.