Version 8.0.6 or 8.1.0?

Some days ago I downloaded the new version:  German, filedate 2016-09-03. It should be 8.1.0, but the "About" and the fileinfo show me 8.0.6?

Now I downloaded it again (Editor: Manusoft), and when I want to install it I get a message:
"Another version of this product is already installed. Installation can not be continued. Use System option "Programs and Features" ...

Never seen it before - Bug or feature?

Bug. The originally uploaded MSI was not correct; it had the new package code, but still old files. The one that is available now should be correct. If you uninstall from Control Panel, then install the correct MSI, all should be repaired.