If you see a duplicate machine listed under one of you licenses, delete the duplicate.

If you can't download your license to the Xojo IDE, go to your License Key page at the Xojo website and verify you haven't used all your activations already. First, make sure you have a free activation to use on this machine. How do I activate my Xojo license on a new machine? I can't update and download my Xojo license to the IDE.You may be asked to verify your email address, in which case use the email address that is the current default address listed in your Xojo account. Then, in the Xojo IDE, open the License Key window and drag and drop that license file into the window or click the Add button to add the file. To activate your Xojo licenses manually, go to your License Key page and click on icon to right of the Expiration date to download the license file. Manual Activation: I need to activate my license but my machine is offline, in a secure facility or on a research vessel in the sub-arctic.Also for Lite licenses, make sure you aren't using a database other than SQLite. For Xojo Lite licenses, make sure you have only selected the target desktop platform of your license (i.e., Xojo Windows Lite licenses only build for Windows). Do you have the appropriate Xojo license to build your project? For example, if you do not have an iOS license then the Build button will be disabled for iOS projects.If you want to build web apps to deploy to your own server, you'll need to check the box next to the appropriate OS. For web apps, by default, only 'Xojo Cloud' is selected. If you don't have a target selected the Build button on the toolbar will be disabled.

Do you have a target OS selected in the Build Settings? You must have a target selected in Build Settings in order to build.

If you don't see your license listed there, click 'Update' in the Licenses tab and Sign In with the same Xojo Account you used when you purchased. Have you activated your license in the Xojo IDE? If you have activated your Xojo license you will see it listed in the Licenses tab in the About Xojo window in the Xojo IDE.If you have a Xojo license but cannot build, either because the Build button is disabled or you got an error saying you need a license in order to build, here's what to check: You need a Xojo license in order to build/compile Xojo apps. 2.4 8 Digit Codes & Legacy Authorization Codes.