Sorry that Photoshop is not working after the recent app update and the freehand selection made with Lasso tool turns out to be a Rectangle.
Which version of Photoshop are you using and what is your computer's OS? Would you mind restoring the preferences for Photoshop & see if it helps? See this article for reference: https://t.co/ulJI7cGn1G You may want to backup your settings beforehand: https://t.co/4dX7gkr36D
To turn off Auto updates in the Creative Cloud app:
Open Creative Cloud application
Open preferences by clicking the gear icon on the top right of the window
Go into the Apps section of the window that opens, there you have the option to disable auto updates.