That was covered in the email that accompanied the announcement for 0.9.29:
In this version we have changed the way the name “Sub 37” appears across all components. You should now see it as “Sub 37” (rather than “Sub37” or “Sub-37”) everywhere, which also means the preferences folder name has changed from “Sub37” to “Sub 37”, so once installed and ran for the first time, you may want to copy your preferences files from the “Sub37” folder to the “Sub 37” (new) folder so you can keep your old settings and presets.