Both new installs and version upgrades are done using the same self-installer. For upgrades it is only necessary that you "Exit" the NoteFrog™ program (use the drop-down program "Exit" menu or the Tray Icon right-click menu) prior to running the setup program.
Upon every execution, the NoteFrog program searches for an existing copy of its own initialization file: NoteFrog.ini to determine if this is a "first time" execution of this program and version. It looks first in the Windows "hidden" application data folder for an already present "NoteFrog" folder. If no such Folder and Notefrog.ini file are found, the program next looks in the NoteFrog program folder where the program itself is installed.
Need case where user has previously installed into other than the hidden folder
On Windows XP:
C:\Documents and Settings\"user name"\Application Data\HTConsulting\NoteFrog
On Windows Vista: