I'm so sorry that's been your experience with our product! It sounds to me like it could be a browser related issue. Have you tried accessing the site in another Internet browser to check and see if the Image tab is there? This is what your editing experience should look like, including a few helpful tips:
Let us know if that helps. If trying in a different browser also doesn't work, check out this FAQ on Connectivity Issues in Constant Contact. If those steps do not help, keep in touch, and we will help you get this issue fixed!
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