Reinstall (repair) CC app to fix Ps display issue

Now I have two issues.

#1 - Photoshop (Ps) stopped displaying brush spray correctly.  Looks like sandpaper and should be smooth airbrush quality.  Had been working.  Issue is present with stylus (pen) or mouse.  Tried many brushes and parameter changes with no real effect.  Pressure sensitivity is still present.

#2 - In trying to fix this issue, I wanted to repair Ps.  I learned there was no "repair", so I uninstalled normally through Control Panel.  Now I can't reinstall from CC.  CC thinks Ps still there, but it's not.

System: Lenovo Yoga Win 8.1 with stylus.