The data folder path is “%APPDATA%/Dynalist/dynalist/data” on Windows, “~/Library/Application Support/Dynalist/dynalist/data” on macOS, and “~/.config/Dynalist/dynalist” on Linux (cases might differ from how they appear here, try both “Dynalist” and “dynalist”).
If there isn’t open yet, you can open a feature request for picking/reading a folder of your choosing.