Maybe try changing the default to something other than transparent and white, then save it, and then create a new token and see if it has the new tint. If it does, go back to token settings and change to transparent, and see if the new setting sticks when you create a new token. Any setting change will only apply to tokens created after the settings are changed, so you'll have to modify existing tokens. Luckily, you're a pro user, and tokenmod makes that easy. If the above doesn't work, could you be running some other script that is altering the tint? There's a Health Aura/tint (cant remember exact name) script that applies a tint whenever you drag a token into the map, for instance, if you don't edit the code to stop it happening.