I’ve posted a new beta build (5611) of FontLab Studio 5 version 5.1.5.
This is a test version of a free update, which will require you enter your FontLab serial number during the install. I suggest you first rename your existing FontLab Studio 5.app to, say “FontLab Studio 5 old.app” before you install the new build. This way you can run your previous version at any time if the new version proves an unworthy successor in any way. I do not expect it, but it is better to be cautious in such things.