Hello RusselB, thanks for your comment !
What do you think about the new code? I think it's better like that. The timer was changed, -hm options were removed.
About the "$calc" problem, that works for me... It should for you too. What version of mIRC do you use? Update to the last one ! ;)
Now, it's the same alias to create a db , and to compare.
Juste type " /updatedb -create " or " /updatedb -compare ", all should work correctly...