I've never known a way to upgrade (or down grade) Windows and keep your programs. I'm honestly surprised that no one has suggested to look up your MS Office product key. It was in the help menu last I remember. After that you just get the same Office.exe as the version on your Win 8 machine, install (it'll give you a 30 day trial in typical Microsoft fashion) and enter in your old product key (cause you should've written it down before you started the 7 install).
Fresh installs are best. A upgrade disk can be used for a fresh install (install initially, then upgrade the fresh install as the system only checks for a previous version of Windows, not a valid version). Takes up a lot of space though (my "upgrade" 7 Ultimate OS took up 27 GB after the install, takes less than 14 GB as a fresh install).
I haven't been impressed with Windows 8.1. My wife has a 3 month old Dell with i7…I can still boot my mid-2010 MacBook Pro (Core 2 Duo) into 7 quicker than she can boot into 8. Microsoft is down in a rut with truly great OSes every other release for the last 16 years now it seems.