mSecure 5 is a UWP app. It has no executable file. To create a shortcut, find the app icon in the Start menu, click and hold the icon, and drag the icon to the desktop or whichever folder you would like to use.
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I'm glad you figured it out. About the support website issue, I'm using Chrome on both Mac and Windows and have no issues using the search icon on the top right. However, please note that the homepage also includes a big search area as well: