I have the Dutch version of Windows 10 (version 1511 - build 10586.218). And I had the same issue. Speccy got uninstalled and after I installed it again, I got the notification again. However, Speccy itself is still in the installation directory and runable.
It would be nice to let the installer remember the options supplied on the 'Install options' page. Now I have to provide these options every time there's new version. This is quit annoying... - If you don't want the 'tool bar' options remembered (I can understand this), you might move that option to an extra installer page. I don't understand why the other options are not remembered. This is default functionality for (almost) all installers Regard, R