Hi, I have written a custom.nsh script that adds symbolic link functionality to PortableApps launchers. You can find it here, functionally replacing the DirectoriesMove function.
It does have some disadvantages (NTFS-only and admin required) but there are use cases like videogames or apps that generate a lot of data where I find it's the optimal solution. Please check it out if you have the time and tell me what you think.
I have tested it with hundreds of self-made apps and it works almost perfectly. The only issue I found is when attempting to run multiple instances of the same app simultaneouslt, some empty folders are left behind but I'll fix that soon.
Thank you for your time.
This is a great script.
The symlink should be a native option for expert developper.