nvda

d05d258d - Installer: detect if a previous version of NVDA has been installed, and if there is one, alert the user of this, and then run the uninstaller, before the user continues with the install. The message that alerts the user needs to be changed so it can be localized. Also we may want to investigate how to stop the uninstaller from asking for a reboot, and instead having the installer ask at the end.