[2021] Low resolution 3.0 techs

You can move any valued save games elsewhere, and user_empire_designs.txt from /Documents/Paradox Interactive/Stellaris/ if you have made any custom empires or races. Then manually delete the Documents/Paradox Interactive/Stellaris folder completely.  

There has been no change to the game itself in that time. Did you install or update a mod that might be doing this to you?

Does the same fix work again?