In VS 2010:
Right-Click on the project name. Click the Compile tab. At the bottom, click the Advanced Compile Options button. At the bottom of the form that shows, is a drop down list where you can choose the .net framework target.
I don't get the Compile tab. The options I get when I right click is as follows:
Build, Rebuild, View, Add, Open Folder in Windows Explorer, Add Solution to Subversion, Add Selected Projects to Subversion, Update project to latest version, View Project History, Subversion, project File, Cut, Remove, Rename, Properties.
I am using VS2010 Professional and it's a c# project.
sorry tinstaafl :( but I still can't change the framework for a merge module project. Please have a look at the image attached, this is what I get when I right click on the project.
The steps you have listed above, I do get them for a WindowsFormApplication project.
Sorry, had to look at a merge module and refresh my memory. Have you tried your existing one? What kind of errors do you get? From my understanding of Merge Modules, you should be creating a new one for every version of your project, not re-using them