Hi Mir4ea, there isn't any sort of "one click" built in operation for removing fillets, but it is possible to remove them by selecting them and deleting them, and then untrimming and retrimming the surrounding geometry.

Check out the object repair tutorial for some information on the untrim/retrim process:
http://moi3d.com/forum/index.php?webtag=MOI&msg=446.17

- Michael