DNN 7.4.2 on Azure

I have two staging websites. I had SearchBoost installed on them until I uninstalled them. After the uninstall, I noticed that the Log started showing errors:

1. Scheduler Exception - Unable to create Lucene writer (lock file is in use). Please recycle AppPool in IIS to release lock.
2. Scheduler Event Failure - Unable to create Lucene writer (lock file is in use). Please recycle AppPool in IIS to release lock.

These errors appear frequently. I searched around and made the following changes:

1. I deleted the Scheduled Jobs related to SearchBoost
2. I re-uploaded the 3 Lucene dlls to the bin folder
3. I updated the web.config to re-add the dependentassembly tags
4. I recycled the application domain and re-indexed the content
5. I stopped Azure and restarted it

By now I should be free of SearchBoost and have it back to the original settings for search but I'm still getting those General Exceptions and Scheduler Failure exception. How can I force the site to release the lock file? What am I missing?