1. Click the Download button on My Page to download the installation file.

2. Select the Keep button to continue the download.

* Which software is showing these warnings?

It might be your antivirus software, your internet browser, or the operating system that generate these warnings.
For example, Windows 8 and Windows 10 come with Microsoft Defender and SmartScreen which monitor the websites you are visiting and the software you download. They might issue warnings about certain application files. Unfortunately, this happens mostly for the software of small developers as their software applications are not so frequently used as the software of the big software developers.

3. To bypass the message, click on "Show more". 

If you trust and want to help the maker of the software, you can report the app as safe. If enough users do that, the warning will eventually be removed.
Select "Keep anyway" to dismiss this warning.

4. Select Show in folder and run the installation file.

5. Click the "Run anyway" button in the executed smart screen window. 

6. Proceed with the installation according to the downloaded installation file.