Fixed. Will be in next release.
The issue is that STRPRINT of a Date/Time structure like $Now is not supported as a simple element. It must be used in a FmtTime or FmtDate function. The new script editor dialog (improperly) allows it, but the STRPRINT (parent) dialog caught the invalid parameter, but that bad parameter was mis-reported by the new Script Editor, which caused it to try to set focus to a text edit field that does not exist, hence the crash.
I fixed "both" issues - where the Script Editor dialog will catch the invalid $Now "Element" command parameter (the bulb in the Element field will now be RED, not GREEN), along with the parent STRPRINT dialog properly handling a parameter field that is not in range.