[rapunkill]

You can use the mklink command to link files since windows 7

https://www.tenforums.com/tutorials/131182-create-soft-hard-...

[davrosthedalek]

All linking tricks are often defeated if the program in question writes to the file. Especially on windows, it's common practice to first write out a new file, if you didn't crash, remove the old file and rename the new file. This breaks the link. I'm not sure if this is also common for config files, but I would not be surprised.

[Epskampie]

Just link the parent folder into dropbox, I do it for savegames all the time.

Or switch to resilio sync, it’s great and selfhosted. Unlimited folders can be used.