You can update the license and product information in QuickBooks without going through the install/reinstall process.
You must edit the qbregistration.dat file to avoid uninstalling and reinstalling the product. There are two ways to edit this file:
Open the file through QuickBooks
Open the file through Windows Explorer
Edit the qbregistration.dat file
The qbregistration.dat file contains the product information for all installed QuickBooks software. The following sections indicate the version and edition of each installed program.