This is the update with the Thawte digital certificate installed – which means an extra guarantee that the application is from a verified, trusted source. Download is here. No new features in this update.
- switched from self-signed to Thawte security certificate
- is also signed with the old certificate to enable smooth migration
Only if you make a new install will you be able to see any difference
to wit, this screen:

Code Yellow during install: the publisher's identity is now verified