I recently purchased full copy of Poser 2014 Pro from SM and the process seems to be the same or at least similar,

 - Download and install the download manager.

 - Start the download manager and input the serial you rec'd when you purchased the program. The install manager connects to SM website and downloads list of all installers available for your serial - For full version of PP 2014 Pro, this gives the main proggie, the qeue manager (do NOT confuse with the download manager - this is to help in doing parallel rendering) and the various content packs.

 - For Pro version, you are also provided PowerFusion plugins which help in using Poser data with 3D creation apps (3ds max, maya, lw, c4d). To download plugins, start the install manager and input the serial (I had input 3ds max serial and got the list containing plugins for the remaining 3 apps)

 - Install the apps directly or by choosing install from the download manager and enjoy!

NOTE: For backup, you have to do the following additional steps,

 - Determine the path where the installers are downloaded (the path is shown at the bottom of the download manager). Hovering you mouse over individual download entries in the manager also shows path to the individual file. This is same as the path jennblake has mentioned in their earlier post and NOT some new info :-)

 - Once you have located the download path as above, you may want to backup the SmithMicroDLMDownloads folder and its sub-folders, as additional files here are used by the download manager in case you wish to install/reinstall through the download manager interface.

HTH