If you have moved the location of your Malleus deck, consider changing the value of deck_name to the current location in your deck:
{
"deck_name": "Pre-Made Decks::Malleus Medicine"
}
The cache_expiry is used to determine when the database should be synced with the database at malleuscm.notion.site in days
Generally the lower the better as you will be able to stay up to date with the database, but you can increase it if you find that it is bothering you.