I just updated my litecoin core wallet. To do this I backed up my wallet, downloaded the correct version of litecoin core for my computer (mac OS X), and then installed the software. Usually when I open the litecoin wallet, the first screen that opens before the wallet says "Litecoin Core" with the version. After this, it switches to the wallet with all the features that you can do (Transfer, etc).
However, when I open the new version of the litecoin wallet, that first screen that pops up with the version and the litecoin logo has been hanging for several hours now. There is a message that says "Rewinding blocks" at the bottom. What does this mean? How long should it take to open? Did I do something wrong?