See http://forum.andromda.org/viewtopic.php?f=33&t=6934 for workaround (manual update).
1) Close VS
2) Install androidVS via its executable
3) under your personal profile on your HD (/users/<username>/my Documents) you should see that a 'Visual Studio 2005' directory has been created. Within that directory is an 'AddIns' directory. Copy the 'AddIns' directory to '/users/<username>/my Documents/Visual Studio 2010'
4) Go into the '/users/<username>/my Documents/Visual Studio 2010/AddIns/' and edit the file 'AndroMDA.VS80AddIn.AddIn'. Within that file change the value of the <version> attribute. So to go from VS 2005 to VS 2008 I changed the line from: <Version>8.0</Version> to <Version>9.0</Version>. I don't know if 9.0 will work for you, you'll have to experiment a little
5) If all of the above went smoothly, start VS and the androidVS wizard should kick off to complete the installation