Drag and drop folder is a good idea, BUT I think maybe there must be a kind of file limit to prevent FFAStrans from becoming unresponsive caused by too many files being submitted. But I'll look into it
I'm not sure I agree with you on the double click thing. Double clicking to open something is a very common action, but you would rather the workflow showed in the editor once you have selected a workflow?
Are you referring to the warning message that show when you try to enable a running workflow? If so it's obviously wrong and I will fix that. Thanks for reporting

-steipal