Install locations are folders that the itch app installs games to. The initial install location is in a folder your user has write access to without requiring administrator rights.
That's why games aren't installed to
Program Files on Windows. As a rule,
the app can be installed and used without ever asking for Administrator
privileges, except for sandbox setup or third-party installers.
Changing the default install location
In the preferences tab, whichever location is highlighted in hot pink is the one new installs will be installed to.
To change the location games are installed to, add a new one by clicking the
Add location button, then click on its name to set it as default.
Removing install locations
You can only remove locations that no games are currently installed in. To see all games installed in a location, click the folder icon.
Moving game installs between install locations
The only way to do this at the moment is to uninstall a game, then install it again (after having set another location as default).
Part of the reason is that some games use external installers, which could set up programs that rely on being installed at a certain path. Moving them would break the install. We have a plan for that.