We had created MSI project (.ism) in Installshiled 2009 (way back in 2010). We had created a File Type association say .abc1 , along with the Icon for the files. The files icon used to change to the defined icon in MSI project and also double clicking the file used to open the application. However after we migrated the MSI project from InstallShield 2009 to InstallShield 2013, the file type association is lost. The pre-defined icon does not show up for the file types and double clicking doesn't work as well.

This is very important for us to be sorted out. Any help will be much appreciated.