R: Update R version

A. Update R through RGui

• Open RGui through icon or open RGui from the directory (C:\Program Files\R\R-3.6.1\bin\x64\Rgui.exe)
• In the Gui, enter the following.

install.packages("installr")
library(installr)

• Under “install” menu, click “Update R”.
• Click through the dialogue boxes.