[Tower3D: a few questions from a newbie]

Hello everyone.  Just discovered this product and have about 5 hours of playtime in so have a few initial newbie questions that I haven't been able to find via search. Apologize as i'm sure they have been answered over the past few years but did my best to search to no avail.  TIA for the help and looking forward to diving into this game more

• Is there a way to upgrade from Tower3D to Tower3DPro? Any credit for the $30 already paid towards the Pro cost of $50?
• How can I change the transparency of the various radar windows as well as the tiles screen? despite having a fairly big monitor, the 3 windows obscure a good part of the tarmac.
• Is there a list somewhere of all the various commands that are allowed in the command window? Struggling to find the right syntax to use to give a taxi route but telling the plane too hold at the last ramp prior to entering the runway or terminal. 
• Is there an add-on or dlc that gives you the ramp IDs on the ground radar? I've seen screen shots that show it but maybe it's only available on the Pro version??