Cheers for the reply.
Since my last post, and without me doing anything, the latest video (VR rodeo) has appeared and isn't a duplicate so its working fine.
I tried sudo supervisorctl status and that gives the proper message.
I ran php artisan migrate:refresh and initially got error that application in process. Running sudo supervisorctl stop all then running php artisan migrate:refresh did rest the downloader (it asked me to put in API key again, refreshed my videos list, reset rules to blank and which videos marked as download - which I was expecting!). But strangely all the videos again were duplicates, even more strangely, the most recent video (VR rodeo) was not. Is it calling on same local database or something again? Then again this not issue for me as working great now - only mention it if bug for you.
I have kept app in opt/giantbomb_downloader (as default) so think cron job working as mentioned it had refresh to have VR rodeo on there.
I have added some rules and will let you know how I get on.
Regarding how many days - I feel 30 days fine, would more slow down? Just wonder whether would useful to download series i.e. Yakuza from start but TBH fine at 30 days for me is attraction is downloading videos ongoing.