I have a microsoft visual studio installer which installs an exe and 2 dlls.
Normally when I make a change to my exe I just change the Version number of my setup project and all works fine. (Exe gets upgraded, Add/Remove Progrmas entries are fine)
But this time I mistakenly changed the UpgradeCode (Generated a new number). Now when I upgraded by double clicking my new installer the following happened:
1. The installation process went fine.
2. The exe in my Program folder dod not get upgraded.
3. There were now 2 instances of my program in the Add/Remove Program files.
Now I Have uninstalled both versions from Add/Remove Program files and I want now to in stall the old version of my program so I can test the new installer again it wont let me. It says:
"An error occurred while trying to install MyProgram" - PLease see log file.
I think I have screwed things up because I changed the UpgradeCode. How can I solve this problem.