I don't know if it is a lack of documentation, a problem in the logic, or the config file is being ignored, but I'm seeing extremely high costs for moving an enchantment from a tool/weapon to a book.

For instance, level 3 efficiency with a cost of 12 levels. I was expecting 0 or 1 level for the cost.

This is my config file:

{
  "allow_removing_curses": true,
  "dedicated_server_options": {
    "alternative_cost_display_enabled": false
  },
  "client_options": {
    "show_enchantment_cost": true
  },
  "disenchant_to_book": {
    "enabled": true,
    "consume_enchanted_item": false,
    "cost_config": {
      "count_mode": {
        "type": "grindenchantments:count_levels"
      },
      "cost_factor": 0.25,
      "cost_offset": 0.0
    }
  },
  "move_enchantments": {
    "enabled": true,
    "cost_config": {
      "count_mode": {
        "delegate": {
          "normal_factor": 0.25,
          "treasure_factor": 0.25,
          "type": "grindenchantments:count_levels"
        },
        "type": "grindenchantments:first_enchantment"
      },
      "cost_factor": 0.25,
      "cost_offset": 0.0
    }
  }
}

Replacing all the 0.25 entries with 4 in my config file does not make much difference in the displayed cost:

Pickaxe with Efficiency 2: Cost 12
Hoe with Efficiency 3, Unbreaking 3: Cost 21
Hoe with Efficiency 3: Cost 15

Updated config:

{
  "allow_removing_curses": true,
  "dedicated_server_options": {
    "alternative_cost_display_enabled": false
  },
  "client_options": {
    "show_enchantment_cost": true
  },
  "disenchant_to_book": {
    "enabled": true,
    "consume_enchanted_item": false,
    "cost_config": {
      "count_mode": {
        "type": "grindenchantments:count_levels"
      },
      "cost_factor": 4,
      "cost_offset": 0.0
    }
  },
  "move_enchantments": {
    "enabled": true,
    "cost_config": {
      "count_mode": {
        "delegate": {
          "normal_factor": 4,
          "treasure_factor": 4,
          "type": "grindenchantments:count_levels"
        },
        "type": "grindenchantments:first_enchantment"
      },
      "cost_factor": 4,
      "cost_offset": 0.0
    }
  }
}

Subsequent tests indicate that the config file is ignored. At least as far as I've modified it.

The file format for the config file has changed between 1.6 and 2.0, you may have to delete the config file, and re-apply your changes after letting the 2.0 version create a new config file. Also, prices are a lot more expensive by default in 2.0

Your config is missing the normal_factor and treasure_factor fields for count_levels in the disenchant_to_book case (look for "Error decoding config" in the log). In this case, the mod will simply use the default configuration.

@mschae23 Thank you. I copied the entries from another section, added them to that section and now the costs are what I was expecting.

Note: the default config file was missing those entries. Perhaps because the default had a different cost type?

Note: the default config file was missing those entries. Perhaps because the default had a different cost type?

Yes, the default is using the count_min_power type, which does not have those fields (or any other options).