Once you've logged in successfully, select the 'Have multiple Simplero IDs?' menu item
Enter all the email addresses OR Simplero IDs (separated by comma) you may have used and click the Send confirmation email button
We'll then send you an email to each address with a link that you need to click. When you've clicked ALL OF THE LINKS, go back to your Simplero account so you can execute the merge by clicking the blue button.
Your Simplero ID going forward will be the one on the right.