What update are you referring to, app or system? Which version of Windows and Lightroom have you installed?
Also, is there more than one version of Photoshop installed on your system? Which image format are you working on?
Would you mind sharing your workflow?
"Edit In" will not work if the original files are unavailable to Lightroom. Where are the images located? Could you please try deselecting "Use Graphics Processor" in Lightroom's Preferences > Performance, then relaunch Lightroom and let us know if it helps?