This panel will only display if the install program detects an existing installation of Typequick. On Windows machines this check is done early on via the registry, but on other operating systems the check is made only when the installation folder has been selected (the panel displays if the folder already exists).
If an existing installation is detected the install will update that installation rather than creating a new installation in an entirely different folder.
On Windows machines, it is not possible to have more than one installation of the Typequick Program.
For other operating systems, it is possible (but not recommended) to have more than one Typequick installation.