ToME: the Tales of Maj'Eyal

Hello there.
Is there any way to "lock" all unlockables and delete achievments? I want to have some kind a fresh game once more.
I have a Steam version of the game.

Log onto the main website and there should be a button somewhere in one of the profile tabs to reset completely. I don't think it resets steam achievements but it will reset website and unlocks (I think).

Thank you, i found it.
My profile - Reset Data.
It didn't reset my Steam achievements, but "reset all unlocks" was enough.