Installing a bootloader wipes out the firmware, so you must install firmware (use Rescue method) after installing a bootloader.
I hope you saved your settings (File->ExportUAV...) or you may be starting over... Remember and do this when you get it working.
Do not do anything that mentions Erase (Settings). Installing bootloader or firmware does not have to erase settings. It could be that your settings are still there after installing these, so being careful to not erase can mean that you don't have to start over.
Be aware that the Firmware page has a Rescue button. If you mess up your settings so the GCS does not connect any more, unplug board, go to firmware page and press Rescue, then plug board in. After that you can press SafeBoot to boot with default settings. Go and set the thing you messed up back to the way you want it, and the board will then boot normally.
Also, there is an Upgrade button that should put the firmware back on (like after you install a bootloader). Or after starting Rescue procedure there is a Flash button that will appear that will also flash the matching firmware like Upgrade.
I actually have a Bixler2 with a Revo in it too. Here are the exported settings with the board calibrations and such removed so you can just import on top of your working setup. You don't want to be using my board calibrations. You must have your own board calibrations, transmitter setup, etc. working correctly. I usually fly with FixedWingPathFollowerSettings->HorizontalVelMax/Min set to 12/12 for a constant speed, but I have set it to 10/14 for you (untested). I can tell you that 12/12 works fine for RTB and waypoint flying. But...
Be aware that there are many airspeed warnings/errors that happen in flight (at least partially due to my 12/12 speed) and that waypoint flight will by default jump back to waypoint #1 when this happens. To avoid that, set ErrorWaypoint (I forget exact name to -1 for each waypoint and it will work OK.
Beware that there is a bug when flying Manual mode and switching to Attitude mode. While flying Manual, the stabilization winds up (it shouldn't) so that when you switch to Attitude, it goes crazy for several seconds (like full aileron and full elevator and you must correct OR you should avoid it by reducing throttle to zero (that zeros the windup) before you switch from Manual to Attitude OR you should avoid Manual altogether (instead use Rate once you have it flying in Manual and tested in Rate).
The magnets in the canopy cause the Revo mag sensor to go crazy. I put a DJI GPS/mag on top of the rudder which makes it more tail heavy. I have a big battery and heavy camera in the nose to compensate.
I had issues during RTB where the motor would jump back and forth between 0% and 100%. I hacked a work around by setting the ThrustLimits to more reasonable values.
I tweaked the PIDs in bank #1 so if you want to use them, set up your Flight Mode Switch to use bank #1.
There are many settings that I should further tweak (e.g. ScaleToAirspeed*), but this works for fixed speed RTB with the speed set to 12/12.
Test test test, and try to understand all the settings when carefully tweaking.