Tiny Umbrella and Cydia

I’m not sure where this question belongs. When I fire up Tiny Umbrella, there is this message - something about Cydia not working. I’m not sure what to untick on the Settings sreen in Tiny Umbrella. There are two statements relating to Cydia. I presume Cydia is ome sort of service/server to store the ?signature file of each iOS version. I would very much apprecaite if someone can tell me how I can use Tiny Umbrella without Cydia. Does it get saved to your own hard disk or what? Thanks.