The folder that Soundminer uses to store its data is hidden…
macOS
To reveal it, swap to the finder, use the Go menu to Go To Folder and copy and paste the below in.
~/Library/Application Support/SMData
Make sure to include the ~ and hit return when you are done.
Windows
To reveal it open up an Explorer window and enter in
%APPDATA%\SMData
Logfiles are stored in
%APPDATA%\Soundminer