We're happy to follow up last week's release as announced at Build with a small but important polish and bug fix release. We've taken into account a lot of great initial feedback from last week. Keep it coming!
We also encourage you to check out Miguel's talk wherein he presents a deep dive on Workbooks & Inspector!
Most notably, this release allows you to insert and remove arbitrary code submissions, which completes general workbook authoring functionality. We've also introduced a "Run All" button to quickly re-execute the entire workbook.
See the detailed release notes for a complete list of fixes and improvements.