Double-click is from the 1990s. It should be ban'd. This page shows you how to setup single-click to open files, for Microsoft Windows ＆ Linux.
At first you may find it annoying. I first tried it for few days, got annoyed, switched back to normal double-click. But after a month, i went to single-click again, and this time stick with it. Now i've been using single-click for 4 years now, am happy with it.
To turn on single-click in Windows, just go to Control Panel, Folder Options.
Turn on checkbox for selecting files.
For Linux, how to set it up depends on your Window Manager. Usually it's in file manager preference.
To Select files, hold down Ctrl and click. For single file, hoover mouse over item will automatically select it.
Another convenience is Mouse Hover to Auto-Raise Window.