To edit a formula in Clay, you need to:
1. Click on the column header of the formula you want to edit
2. Select "Edit column" from the dropdown menu
3. Click the gear icon to access the formula settings
4. Make your changes to the formula
5. Click "Save settings" to apply your changes
If you're still having trouble accessing your formula, please share a screenshot of what you're seeing so we can better assist you.
Panagiotis - Sorry for this, it looks like we've got a bug on our hands. I've escalated this to our engineering team to help look into it. We'll follow up here as soon as we know more!