Oops. You are right. Clicking on the retention time numbers above detected peaks no longer works to select the peak.
This got broken by the recent work related to PRM collision energy optimization.
I will fix this soon.

In the meantime, if you need a workaround you could click on the "Chosen" checkbox in the Candidate Peaks grid to select other peaks.
You can bring up the Candidate Peaks grid with the menu item "View > Other Grids > Candidate Peaks".
-- Nick

You can also roll back this Skyline-daily installation by going to "Add or remove programs" and asking to remove Skyline-daily. You will be presented with a form that asks if you want to uninstall completely or roll back to the update before this last one.

Thanks for reporting this issue!

--Brendan