This isn't a question about it, it's a how to.
First the disclaimer. This is not difficult to do, but YOU WILL BE DIGGING AROUND IN THE BRAIN OF THE PLANNER. If this scares you, then wait for the update.
For those willing to risk it, you can't hurt your saved builds, and you can always re-download the planner to fix anything that goes horribly wrong, so... Lock up the cat and the children and duck in.
Step 1- Go to the OPTIONS tab and mouse over the word ADVANCED. This will pop out a little menu with DATABASE EDITOR and the thing we don't want.
Step 2- Click the button marked MAIN DATABASE EDITOR. You have now sawed of the skull. What you see before is the exposed brain of the Designer. On the left side is a list of archetype sets. Look for POOL. Click it.
Step 3- The middle column will now list the pool sets, with the individual powers in the right column. Go to the FLIGHT pool in the middle column, then select FLY from the right one. At the bottom of the right column is an innocent little button marked EDIT. Take a deep breath and click it.
Step 4- We are now going to re-wire the brain. What you see before you are nine tabs that work together to tell the Designer what "Fly" does. We need to tweak two of them. Select the Second one from the left, POWER ATTRIBUTES. The left side of this window has a bunch of words and some boxes with numbers in them. The only one we care about, (and are not afraid of at the moment) is the top one. It says "Level Available" with 14 in the box. Change that 14 to a 6.
Step 5- Now move to the scary tab: REQUIREMENTS. This is where we set the prerequisites for a power. Since we are editing Fly, we can see both "pool.flight.combat_flight" and "pool.flight.air_superiority" in the Power A side of the Required Powers box. Select either one.
Step 6- At the bottom of the middle of this window are Buttons Labeled "Copy" and "Paste". Leave them alone. Just above and to the right is one marked "Reset". Just above that is one marked "Remove Selected". Clicking this button will cause the prerequisite power highlighted above to go away to live on a farm somewhere. With ducks. Repeat this for the other Prerequisite power..
Step 7- Click the OKAY button on the lower right. This takes you back out to the main screen where you can select the next pool to change. Repeat for each of the remaining three travel pools.
Step 8- After hitting that last OKAY button for the last time, you should be back at the screen that opened in Step 2. The main power selection screen. At the bottom right is a button marked "SAVE AND CLOSE" Almost predictably, this will save the changes you've made and close the editor. This is the last chance to change your mind. Don't be a wuss. Click it! CLICK IT NOW! Or you can click the Cancel and Discard button and all changes you've made will be washed away.
Step 9- Either way, you are now back at the screen from Step 1. The only thing to do at this point is click CLOSE to exit the editor.
Step 10- I'm not sure if this is actually required or not, but it certainly can't hurt. Close the Designer and re-open it to be sure the changes have taken effect. If they have, you will see all travel powers you changed become available at level 6 with no "redding out" of the prerequisite powers.