I have done so many re-installations of Poser that I don't bother anymore to do anything extraordinary to check if I lost any content. Besides, the Poser 11 content folder is not the only folder I place content into. I have at least 30 different category runtimes on my system that goes untouched when a new Poser version is released and installed. And since the dynamic ebb and flow of content installed to and removed from Poser is a constant recycling of material it is a moot point to worry about losing content when I can reinstall. An all-true headache but easily solvable.