Sadly, it will not. Re-installation would be a Fresh Start.
However, barring any particularly tricky software to install, it can be made rather painless:
It is up to you.
I am one of those... I will reinstall at the drop of a hat.
I have done it so very many times, I have it down to an art form.
It may be worth checking the graphics behavior on the LiveUSB prior to running the Zorin OS installer, though. Just to know...