Difficulty loading Rstudio

Today, I was working on including some environmental path variables in my system. I must have screwed something up because after I did this I'm not able to open Rstudio. When I try to, I get an error stating: "An error occurred when attempting to load the selected version of R. Please select a different R installation". I tried making sure the the R_home is a system variable with a correct path to R executable, deleting R studio and R, and then the Rstudio appdata and then reinstalling everything again. I'm working on a windows machine.

At a loss! Would appreciate any insight - I was definitely beyond my skis here .