I didn't try Playback as I don't have anything recorded yet. 
Be sure to reboot your DNR and clear out all browser caches, exit then relaunch the browser.
I can't get rid of 1.0.0.139 nvrstreamcom control. when i remove the add on, and go to the older system to install 1.0.0.133, .139 comes back.
rebooting new system f/w will not help the old one.
at least the expoort doesn't write to that virtual 20 folder deep location anymore. straight to desktop with .139.
other laptop that does have .139 still works double click in playback. not sure why they would remove it.
manual says double click should work. this will be fun explaining to my 70+ year old parents if I upgrade them. I at least got them not to click on stuff that will break it.
*right click functions also lost in playback that were there. (never used them, doesn't much matter to me).