I had the same issue and this worked for me.
1. go into your hanger, click on "MENU" button (top left).
2. then settings, controls and scroll down to "Auto-Aim".
3. change (right mouse is default) to something else.
4. now click on your "WARPACK" button and down to "Vanga Aim".
5. click on settings button, and change "Aim Key" to (RMB) right mouse button.
All Done!
1. go into your hanger, click on "MENU" button (top left).
2. then settings, controls and scroll down to "Auto-Aim".
3. change (right mouse is default) to something else.
4. now click on your "WARPACK" button and down to "Vanga Aim".
5. click on settings button, and change "Aim Key" to (RMB) right mouse button.
All Done!