I need to install DiGGer on my R sudio windows. Since I am using new R version (3.5) I cannot install DiGGer. So I need to switch it to older version of R (e.g. 3.4.4).
I open R-studio----Tools----Global Options----change----choose a specific version----
Then I only see the latest version of 3.5.
Please could you help me how I can find older version among versions and switch it?