If you have installed prerelease (alpha and/or beta) versions of Adobe AIR, you may need to uninstall them before installing the 1.1 runtime. However, whether this is strictly required can be a little tricky to determine.

Table 2-1 lists the prerelease versions of Adobe AIR and whether they should be uninstalled before installing Adobe AIR 1.1.

Table 2-1.Prerelease versions of Adobe AIR

As Table 2-1 shows, the beta 2 and beta 3 runtimes can run side by side with Adobe AIR 1.0. This allows you to run applications built for beta 2 and beta 3 until those betas expire.

If you do not know whether you have installed the alpha version, it is a good idea to go ahead and uninstall all prerelease versions of Adobe AIR.

Uninstalling on Windows

To uninstall all prerelease versions of Adobe AIR on Windows, follow these steps:

1. In the Windows Start menu, select Settings > Control Panel.
2. Select the Add or Remove Programs control panel.
3. Select the prerelease version of Adobe AIR to uninstall (depending on the version, it may be referred to by its code name of "Apollo").
4. Click the Change/Remove button.

Uninstalling on Mac

Follow these steps to uninstall all prerelease versions of Adobe AIR on the Mac. Depending on the prerelease version(s) of Adobe AIR that you have installed, all steps may not apply.

1. Run the Adobe AIR Uninstaller in the */Users/<User>/Applications* directory (where <User> is your system user account name).
2. Run the Adobe AIR Uninstaller in the /Applications directory.
3. Delete the /Library/Frameworks/Adobe Apollo.framework directory.
4. Delete the /Library/Receipts/AdobefApollo.pkg file.
5. Empty the Trash.

Once you have done this, you are ready to install the 1.1 runtime.