We can perform some troubleshooting steps to determine if the problem of reverting to the previous layout is related to your browser, paul82.
Start by logging out of QuickBooks and then log back in. After doing that, refresh the page to check if the estimates return to the old layout.
If the issue persists, clear your browser's cache to resolve any system errors. Then, ensure to use a supported and updated browser for optimal QuickBooks performance.
Feel free to reach out if you need more help with estimates or any other QuickBooks-related questions.