I have not used the Installer Wizard Project Template before but I tried it out just now to see how it works.
1. I selected an executable and then added some help files in the wizard dialogs.
2. In the Pelles C editor I selected Build and then compile. Both of these options yielded the following status lines in the project tab:
Building Installer Test.exe
Done.
3. Looking in the project folder I see the deployment exe.
4 However if I click "Execute" in the browser I get an error. (Of course in principle it is not wise to test a deployment on one's development machine.)
It would seem to me that the Installer Wizard Project Template is working properly.
There is an alternative utility for easily creating POINST deployments that you might find helpful. I wrote the first version of the tool at a time when Pelles C did not have the integrated wizard. Pelle has included this tool on his site
here.