Yesterday I installed this update, and after some testing it appears to have the same issues as we saw last year with Individual and Partnership Tax Types failing to retrieve data. 

I sent an email to LacerteEncryption@intuit.com and waiting for a reply.

It appears you can not "downgrade" the SDK with out first Uninstalling it from Add\Remove Programs in Control Panel.  I rebooted to be safe, before reinstalling 436 but still seemed to have a problem not getting connected right off.  Not clear what I did, but after building a new connection in a new Excel spreadsheet it started to work with the downgrade (436) SDK.