is there a way when right clicking on a file, getting the context menu is to so a "open with"
If you press the Ctrl key when right-clicking, the Windows Explorer menu will be displayed - which contains the Open With
Alternatively, you can select the Explorer Menu
command from the standard right-click menu which will display the Explorer menu.
If you find yourself regularly opening files with the same program, I would recommend adding that program as a User Command and assigning a shortcut key to it. You can then open a file with that program by simply selecting the file and pressing the corresponding shortcut key.