Not at all familiar with autostart.sh, but looked at the libreelec page and an openelec page and tried entering in the putty window:
Sorry I need to correct myself, the line (ir-keytable -D 600 -P 200) needs to be added to the /storage/.config/autostart.sh file to stick between boots, sorry for the omission.
then entered the following:
# ir-keytable -D 600 -P 200
I'm guessing I'm way off with this and can't google a way to check. Is this the command set that is required?