Short Answer: It's safe to install .9.5 over .9.6.
Long Answer: .
.9.5 stored data files in the installation dir (%PROGRAMFILES%\StrokeIt)
.9.6 stores data files in the user profile (%APPDATA%\TCB Networks\StrokeIt)
If .9.6 finds data files in the install dir, it will move them into a folder called OldData and then migrate them into the profile of the user who in installing StrokeIt. This will give the current user the old settings and any new users will get the default settings.
-- Jeff