Hi,
had the same issue - I've add manually that script
First, copy from the PMPC site, save it as "PatchMyPC-Remove-Application-PuTTY.ps1" and add to Putty by right clicking the app and selecting "Manage Custom Pre/Post Scripts" and select this script file and re-publish app.
IT's very important to give that specific name to this script as it will fail if you will name it differently.
had the same issue - I've add manually that script
First, copy from the PMPC site, save it as "PatchMyPC-Remove-Application-PuTTY.ps1" and add to Putty by right clicking the app and selecting "Manage Custom Pre/Post Scripts" and select this script file and re-publish app.
IT's very important to give that specific name to this script as it will fail if you will name it differently.