Alex–
Starting to work with it you’ll begin to see changes.
Working through full ranges of motion and hitting different corners within the system will help and improve the rom etc.
Where it has been 10 yrs it may take a little time before you start to see change, but stick with it.
I would recommend purchasing a voodoo band.
http://www.roguefitness.com/voodoo-floss-bands.php?wmode=transparent

With a systems approach you’ll find what works best at different times as your are working through it.
As tissue is unglued and sliding surfaces improve you will start to see improvements.
Different aspects will be beneficial at different times during the process.

Episode 352: Dealing With Old Junky Tissue
Episode 334: Informed Freestyling Always

Free Your Heel, Free Your Mind
Ankle Positional Fault Fix: Jill Miller Style
Episode 313: Improving Ankle Range, Super Friend Addition
Episode 285: Sliding Surfaces; Ankle Range of Motion Case Study Part 1
Episode 285: Sliding Surfaces; Ankle Range of Motion Case Study Part 2
Episode 258: Ankle Mobility-Self Mulligan Technique

Episode 204: Donnie Thompson, Strongest Powerlifter Ever, Cares About Your Swelling
Episode 189: Rail Mobgression/Evironmental Opportunism + New Ankle Mob
Episode 163: Knee/Ankle/Achilles Issues? Active Tack and Stretch
Episode 124: Gotta take Care of Business: Don’t Let the Ankle Sprain Win
Episode 69: Triple Extension Problems + Clown Ball Champion