I guess the obvious would be to uninstall and install the previous one? I would make sure to export my settings before doing so but apparently @pascal seems to hint that this isn’t necessary - or am I misreading this?
If you are automatically downloading updates, the previous one should still be present in the update directory:
C:\ProgramData\McNeel\McNeelUpdate\DownloadCache
Note that editing text in a layout doesn’t lag on my system (but I’m on a slightly newer daily). Maybe the cause should be found before uninstalling?