Here are the default UI and settings paths in your Steam install:

**Install root:** `~/.local/share/Steam/steamapps/common/Everquest F2P`

---

## Default UI paths

EverQuest splits UI into two parallel trees, both keyed off skin names in the UI INI:

| Setting | Default value | Path |
|---------|---------------|------|
| `UISkin` | `Default` | `uifiles/default/` |
| `AtlasSkin` | `Default` | `uiresources/default/` |

### `uifiles/default/` — classic UI skin
- **173** `EQUI_*.xml` window/layout files (e.g. `EQUI_PlayerWindow.xml`, `EQUI_HotButtonWnd.xml`)
- Textures: `.tga`, `.dds`
- Subfolders: `loadscreens/`, `overseer/`

### `uiresources/default/` — newer UI resources
- HTML/JS/CSS for modern panels (`index.html`, `index.js`, `main.css`, `cohtml.js`)
- Subfolders: `assets/images/`, `fonts/`, `img/`, `windows/`

### Other UI-related folder
- `uifiles/classic_spell_icons/` — alternate spell icon set only (not a full skin)

Custom skins go under `uifiles/<SkinName>/` and are selected with `UISkin=<SkinName>` in the character UI INI (your repo’s `ui/install.sh` script targets `uifiles/isuldor/` this way).

---

## Settings paths

All of these live in the **game install root** (not under `~/.config` or similar):

| File / folder | Purpose |
|---------------|---------|
| `eqclient.ini` | Global client settings: video, audio, graphics, `[Options]`, `[TextColors]`, `[KeyMaps]`, etc. |
| `defaults.ini` | Shipped factory defaults for UI window layouts and positions (reset reference) |
| `UI_<Char>_<Server>_<Class>.ini` | Per-character UI state: window positions, fades, and `UISkin` / `AtlasSkin` |
| `<Char>_<Server>_<Class>.ini` | Per-character game settings: hotbars, combat, abilities, etc. |
| `_characters.ini` | Character registry (`Character0=Isuldor,bertox` on your install) |
| `userdata/` | Address book, ignore list, guild notes (`AddressBook.txt`, `IgnoreList.txt`, `GN_*.txt`) |

**LaunchPad / login UI** (separate from in-game UI):

| File | Purpose |
|------|---------|
| `eqlsClient.ini` | Launcher URLs and client config |
| `eqlsUIConfig.ini` | LaunchPad window positions |
| `eqlsPlayerData.ini` | LaunchPad player data |
| `LaunchPad.ini` / `LaunchPad-user.ini` | LaunchPad settings |

---

## Your current character

For `Isuldor` on `bertox`:

- UI layout: `UI_Isuldor_bertox_PAL.ini` → `UISkin=Default`, `AtlasSkin=Default`
- Character settings: `Isuldor_bertox_PAL.ini`

So right now you’re on the stock UI at `uifiles/default/` and `uiresources/default/`, with layout/state stored in those per-character INI files in the install root.