It isn't destructive to your server, and shouldn't change any of your data. What it does is simply resets your license so that you can use the same license key when you migrate your server. You will need to run the install on the new server, and it will ask you for your license key. It releases it from the old server so you can use it on the new one. I hope this helps you. :)
ok, thanks a lot. I try to use it!