Logic Studio no longer opening and asking for a licensing code. Not accepting.

For the first time in years, Logic Studio won't open. Instead it asks for the licensing code. I think the last version of Logic I downloaded (over 4 years ago) was done on line so there wasn't one. (I am no longer sure if the downloaded software was called Logic Pro but my boxes on hand say Logic Studio. However even when trying all the codes I have on the boxes, including the toggle key of the first version of Logic I had (eMagic then owned Logic), none of the codes are accepted.

The only difference in my system from yesterday, was that I downloaded a newer version of iTunes. Perhaps that software update has caused this to happen.

Any suggestions on how I can open up my Logic software again will be appreciated.