While you can rollback to PokerTracker v4.15.25
the default sizing for the HUD on Winamax has changed in v4.15.26 so if it is too large you will need to resize it which you can do by editing the size of the font used. You can do this for all stats at once instead of individually by going into 'HUD -> Edit HUD Profiles', selecting your HUD profile and clicking the first stat in the Group Items list in the HUD Editor and then shift-clicking the last. Now you can change the font of all the selected stats at once. If you want to change just a subset to match, you can use ctrl+click to highlight individual stats in that area or in the bottom left pane of the editor.