IS dell kace k1000 is free for life time or 1 year
Dell Kace k1000 license is free for lifetime or 1 year
You have many KACE license possibilities.
I assume you mean the Freemium version Quest KACE K1000 Express, a stripped down Quest KACE SMA (see here: https://www.quest.com/products/kace-express/ ) which has a one year license without costs.
Besides that: all Dell labeled appliances ( the software!) are end of life, so they should be updated to a supported version.
For the currently supported versions see here: