Using relative paths for Windows shortcuts

You can use this utility: Relative.

It basically creates a shortcut to "explorer.exe" with the parameter of your relative path with a right click (same way as you create a normal shortcut).

Of course you can do this manually.
In your example you would create a shortcut in "New Files\Tools" to

%windir%\explorer.exe "..\..\Tested Files\Tools"

You can use the usual context-menu "New/Create shortcut" of Windows for this and typing above command in "Type the location of the item"-box.

One possible solution is use a one line batch file instead of a short cut to open whatever you wanted to open. The batch file will let you use relative paths inside itself and will have a working directory of whatever folder the batch file is placed in.

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Another option is have your shortcut start cmd.exe instead with whatever you are launching then pass whatever it is you are launching in as a argument to cmd.exe

%COMSPEC% is a environment variable points to the command prompt by default.

/C causes the console to close itself after it executes the command.

This trick works :

%COMSPEC% /C start "your exe name without path"

example

%COMSPEC% /C start winmine.exe