Hi @Marcella36021452hk67,
I understand how frustrating it can be to deal with those persistent demo banners while working in Illustrator. It's definitely not the experience we want you to have.
To assist you better, could you please share some details about your system, such as the operating system you're using and the version of Illustrator? This information will help us narrow down the issue.
Additionally, if you're open to it, we could schedule a debug session to delve deeper into the problem and find a resolution together. If that works for you, please send me your Adobe ID, Country & Timezone, phone number with country code, and your preferred dates and time between Monday to Friday via a private message.
To send a private message, click on my profile picture and use the "Send a message" button.
Looking forward to resolving this issue for you!
Best regards,
Anshul Saini