If I understand it correctly, any line in the config.json without a block explorer it is assumed the difficulty data is coming from "https://chainz.cryptoid.info/explorer/api.dws?q=summary", or something that pulls from chainz.cryptoid, correct?

The difficulty of those coins do not appear to be getting updated in this last version of the program (0.5.3).

For example, UFO coin shows up (after I clear all .json files except for the config) at a difficulty of 4.75, but the difficulty from chainz has it much higher at:

  "ufo": {
    "name": "UFO",
    "PoW": "NeoScrypt",
    "PoS": false,
    "height": 1258693,
    "diff": 23.787287800355,
    "supply": 3576672512,
    "ticker": {
      "btc": 1.8e-7
    }

Am I missing something, or should it not be pulling from that summary?