Hello,
Not quite sure I fully understand what you want to do here.
If you want to set APPDIR to a path, you can do so from the Install Parameters page:

- Screenshot_7.png (7.82 KiB) Viewed 3248 times
The highlighted Application Folder is APPDIR.
If this is not what you want to achieve, please give me some more details so I can better assist.
Best regards,
Catalin
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