Do check the lower left corner of your screen shot – you should probably change those now…
Anyway – you don’t have AxCrypt 2 installed. For some reason also you have associated .axx with ‘AxDecrypt.exe’ (which is an old software part of the AxCrypt 1 distribution). This cannot happen automatically, but is rather something you’ve done – probably inadvertently, but still.
Download the setup installer from the download section of https://www.axcrypt.net/ and install it (double-click it after downloading, and follow the instructions).