R for Windows update does leave old versions on the PC

[wokkeltje]

This is probably an issue of the software itselve, but on their website they write the following about how to upgrade
file:///C:/Program%20Files/R/R-3.5.3/doc/html/rw-FAQ.html#Can-I-customize-the-installation_003f
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2.8 WhatÔÇÖs the best way to upgrade?

ThatÔÇÖs a matter of taste. For most people the best thing to do is to uninstall R (see the previous Q), install the new version, copy any installed packages to the library folder in the new installation, run update.packages(checkBuilt=TRUE, ask=FALSE) in the new R and then delete anything left of the old installation. Different versions of R are quite deliberately installed in parallel folders so you can keep old versions around if you wish.

For those with a personal library (folder R\win-library\x.y of your home directory, R\win64-library\x.y on 64-bit builds), you will need to update that too when the minor version of R changes (e.g. from 3.0.2 to 3.1.0). A simple way to do so is to copy (say) R\win-library\3.0 to R\win-library\3.1 before running update.packages(checkBuilt=TRUE, ask=FALSE).
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It would be nice to have a possibility to uninstall previous versions during update.

[Justin Chalfant (Patch My PC)]

We will have an option where you can add custom commands in the next update. This should help if you need to change the installation behavior.