FireFox upgraded to 8.0 and it installed HP Smart Web Printing V4.5.1, not V5.6. Can't Fix it.
One machine installed FF 8.0 with HP Smart Web Printing, this machine did upgrade to FF8.0 and installed HP ... Printing 4.5.1 and says no updates/upgrades available. Says 4.5.1 is incompatible. Both machines run Win 7/64 bit.