Examining this on my new Win 7 computer, I found that my ADT pluggin was missing. By adding this, I solved the problem: Downloading the ADT plugin
Use the update manager feature of your Eclipse installation to install the latest version of ADT on your development computer.
Assuming you have a compatible version of the Eclipse IDE installed as described in the Preparing to Install section above, follow these steps to download the ADT plugin and install it in the Eclipse environment.
Start Eclipse, then select Help > Install New Software.... Click Add, in the top-right corner. In the Add Repository dialog that appears, enter "ADT Plugin" for the Name and the following URL for the Location: https://dl-ssl.google.com/android/eclipse/ Click OK Note: If you have trouble acquiring the plugin, try using "http" in the Location URL, instead of "https" (https is preferred for security reasons). In the Available Software dialog, select the checkbox next to Developer Tools and click Next. In the next window, you'll see a list of the tools to be downloaded. Click Next. Read and accept the license agreements, then click Finish. Note: If you get a security warning saying that the authenticity or validity of the software can't be established, click OK. When the installation completes, restart Eclipse.
source share