If you’ve noticed Chrome://extensions page reporting ‘this extension may have been corrupted‘ for IDM Integration Module, then do the below things to solve the issue to make it work again.
Repairing Corrupted IDM Integration Module Chrome Extension
1. Remove the extension immediately.
2. Keep the Chrome://extensions page open and navigate to Internet Download Manager installed directory in Program Files, drag and drop IDMGCExt.crx on to the extensions page for install
3. Once that was done, repair button appears for the same extension, click on that, with which Chrome shows Repair Extension for IDM Integration Module, click on it, the issue will be fixed.
May 25, 2018: PSA: Windows Defender Corrupts IDM Chrome Extension
UPDATE: Those who’re having this problem, visit this link in Chrome browser and click Enable this item.
For more information, READ: Fix Chrome 53’s Extension Corrupted Errors and Re-enable the Disabled Extensions
If the problem reoccurs, delete the ext and reinstall IDM on your computer and see if that solves the problem.