Issue with setting user roles

[artboard-studio]

Hi

First of all thanks for this great plugin and making it compatible with mojo marketplace. Great work.

Today I realized that the users registering on my site don't get any roles assigned to them, I dug into the plugins codes and realized that over the line 339 you have set the new user roles to participants, which is a role only available when bbPress is installed, I am not using bbPress so I changed the role back to the default subscriber role which works well in all cases, with or without bbPress, or better say, plugin independent. Thought it could be useful to someone else too.

Best Regards