The file you linked is from version 1.9.1 of the plugin.After updating obs studio and advanced scene switcher my macros were gone. I previously exported my settings and now I imported those settings. But no macros appear in the settings. I also restarted obs studio.
I now opened to have a look at the text-file. It´s not that much text. Is this normal?
Also after importing the settings I get a message saying the import was sucessfull. Then the plugin settings window closes. Is this the normal behavior?
This is very old and from a time before the macro functionality was even introduced.
Are you sure you imported the correct file?