Mark,

From 'M-x list-packages' you can use 'g' to update the list, 'U' to mark all upgradable packages (which will presumably include SLIME) then 'x' to upgrade the marked packages. There may be other ways to go about it -- e.g., you can probably simply install the newer slime package after 'g' step -- but this is how I usually do it.

https://www.gnu.org/software/emacs/manual/html_node/emacs/Packages.html contains all the details.

HTH,

Luís

On Wed, Jan 24, 2018 at 12:15 AM Stas Boukarev <stassats@gmail.com> wrote:

That's probably a question for melpa, not for slime.

On Wed, Jan 24, 2018 at 2:58 AM Mark H. David <mhd@yv.org> wrote:
Hi, I installed SLIME with the package installer (melpa), and I have no idea how to control the version. I would like to run version 2.20, but I seem to have version 2.19. Does anyone know how I can change to version 2.20? I cannot find any documentation about this. Can anyone point this out?
Thanks,
Mark