Here are the steps to follow to perform a full reset of the Heredis preferences:
This is risk-free for your own files.
If Heredis is already launched, quit it. Then hold down CTRL and SHIFT while launching Heredis.
When this window shows up, click on Yes:
Note: The version of the screenshots below may differ from yours, but the content of the article applies to your version as well.
Log in to activate the software: