Regression: Unable to open sourcetree project from command line (open -a sourcetree folder) on Mac

I used to open sourcetree from the command line, with the following command:

/Users/amartoq/some/project $ open -a sourcetree .

This worked really before: even if there was a sourcetree already running, it just opened that git project. But now in version 3.00 it only opens sourcetree, not the project.

I'm not sure, but guess it doesn't open that project neither if a folder is droppped in the git app icon.

I need it back, please

Thanks!