Terrain brushes cannot be set - BUG

hey guys,

i can no longer control my brush sizes at the terrain editor.

i’m a Unity pro user (if that’s any matter).

when i first installed Unity i had that important power, but sometime along the way i lost it and now i cannot do it in any of my projects.

do you have a clue?
is it some hidden variable in my unity settings that i have accidentally changed?

i have reinstalled my Unity and it fixed the problem!
i still dont know what it was, but if it happens to anyone, that’s the current solution i have found…