# AMPL Installation Wizard

Here are instructions to upgrade AMPL-Gurobi on Microsoft Windows:

1. Unzip the supplied AMPL-Gurobi file, which will be named something like `amplgurobi9.5.2_mswin64.zip`. This will create a folder called AMPL, which contains the AMPL-Gurobi software. (Note that your unzip utility may embed this AMPL folder inside a folder such as `amplgurobi9.5.2_mswin64`).
2. Copy your existing `ampl.lic` license key to the AMPL folder that was created in the previous step.
3. Replace your old AMPL folder with the new one.
4. If you are using a floating license server for AMPL-Gurobi, please follow the additional instructions for ampl_lic.