Bibsie
What Pack did you purchase? ..
Band-in-a-Box MegaPAK Upgrade
Bibsie
Normally, you install over the top of an existing installation, however, x:\Program Files (x86)\bb\ is now not the preferred install location by most users (and including PGM).

And that is the reason why I am unsure whether to deinstall or not
Depending on the pack you purchased you may not receive new copies of all of your older files from the 2010 distribution.
I have for sure back ups of everything but I does not matter if I loose 210.5 completely.
horst
edit: As I have read the suggestion just to move the 'bb' folder: is BB not registered in windows - so to say a 'portable installation'? Normally you can't just move an installed programm folder