Using Upgrade code to perform Upgrades Method 1 (If the previous msi is available) 1. Open the package (WSI) the has to upgrade the previous package using wise package studio. 2. in gui of the Wise windows installer editor. Under the distribution click upgrades. 3. Click Add in the right hand side of the above figure Browse to the location where you have the old MSI from which you want to upgrade to the latest version (Here we are using the upgrade code from Test2 package to upgrade test2 to test1) Select the second msi package. Here test2.msi All the fields get filled automatically from the previous package. Depending on the process the fields, you can blank out the minimum version and maximum version. Also uncheck migrate feature states. Click OK. Method 2 (if the msi is not available and only the upgrade code is available) Click ADD on the right hand sideClick Cancel. Get the upgrade code and copy it in the above window where it says upgrade code. And make sure Include minimum version in range and Include maximum version in range are checked and Migrate feature states is unchecked Click OK