I tried your script, of course I don't have the hardcoded files and locations like in the script, but I select an option from the dropdown, check the checkbox, and select ok and it tries to open the file, but of course throws and error that it can't find it which is expected. What is specifically happening for you? EDIT: I made some test .indd files and replaced the locations and names in the script for my setup and it opens the indesign documents just fine. I did test script in the ESTK without using #target and I'm using InDesign CC 2019.
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