Written the way IDM writes it in IDM’s own format.
| What | IDM's dialogs | IDM Download Router |
|---|---|---|
| Where the routing lives | spread across a stack of dialogs | one screen, side by side |
| Changing a set of folders | one dialog at a time | reviewed as a set, one Apply |
| New category wiring | by hand | unique ID, mask, pathW as REG_NONE (UTF-16LE) |
| Picking up your changes | IDM caches the registry | force-restarts IDM when the category set changes |
One screen, reviewed as a set and one Apply.
Nine researched presets
Compressed, Documents, Music, Programs, Video, Images, Disk Images, Subtitles, Torrents — extension masks compiled from published file-format lists, not guessed.
The tweaks beside them
Clipboard monitor, launch on startup, browser integration, tray icon, temp and partial folders — the settings you otherwise hunt for.
Single Apply
Everything commits at once. When the category set changes, IDM is restarted so it actually picks the new routing up.
Scoped to one key
Reads and writes only HKCU\Software\DownloadManager, and the app's own config lives beside it — nothing else on the system is touched.

From scattered to set without a dialog each.
Read the registry as it stands
Including the categories you added directly inside IDM — they show up like any other row.
Arrange and edit
Apply a preset, double-click a cell to edit an extension mask, adjust the global auto-catch list.
Apply once
Every change commits together; IDM restarts when the category set changed, because otherwise it would keep serving the old routing.
Questions
Is it safe?
It reads and writes only HKCU\Software\DownloadManager — the same key IDM's own dialogs edit — and stores its own config separately. If you want a belt on top, reg export the key first; the README shows how.
Will IDM notice the changes?
Yes. IDM caches and rewrites the registry, so the router force-restarts it when the category set changes rather than leaving the edit half-picked-up.
What are the presets based on?
Nine categories whose extension masks were compiled from published file-format lists — archives, video, audio, image, document — rather than invented.
Does it run on macOS or Linux?
No. It is a Windows tool for a Windows program; the registry format it mirrors is the whole point.
Set the folders once, and stop fixing them after.
Every IDM category and the folder it writes to on one screen, reviewed as a set and written in a single Apply — instead of nine trips through a settings dialog.
Download for WindowsFree · MIT · Windows 10 and 11
IDM Download Router