First, thanks for such an awesome workflow. I have absolutely loved this.
About a month or so ago, it really slowed down for me. A selection of only 9 or 10 Finder items usually takes about 90+ seconds to preview before the "Apply Now" menu item appears, then it takes another 90+ seconds to actually rename the items. Currently using the most recent Alfred version and Rename 4.0 beta 1 on El Cap (10.11.6) I'm not sure if I've changed some weird setting somewhere? I have an iMac and a MacPro, and the workflow is about the same on each.
Any thoughts? Thanks again.