Basketball Players with Flat Feet

For those of you who play basketball in a competitive league or play competitive pick up games every weekend, and take your rehab seriously, what is your training regimen for keeping your body in top shape year round even though you have flat feet?

I'm 30, 5'7, 154lbs. I've begun to feel aches in my knees and back from playing competitive basketball. I'm looking to completely change the way I train and keep my body in shape because I know the wear and tear on my joints has been mostly due to my flat feet. I know flat feet cause muscle imbalances and all sorts of havoc on the kinetic chain, and has not bothered me to a degree that would affect my performance on the court. But now that it's noticeable and is forcing me to change the way I play on the court, I need to change and evolve because I want to keep improving as a player.

For those of you who created your own training program based around your flat feet, how did you do it?
For those of you who followed someone else's training program, can you please provide links to their website, video, etc?

If you would like to message me to share your in depth info about your training that would be great as well.

I'm attaching a picture of my left foot so you can see the degree of the flatness of my feet.