When switching between product versions on the same server, generally due to a product upgrade, browsers may cache the old version's theme. Clearing your browser cache will resolve this issue.
For example, the screenshot below shows the About Us of DQ_ 3.3, but with the style of a prior version. Note that the caching issue will extend below the About Us and may impact product functionality.
After clearing your cache proper DQ+ 3.3 About Us will display in its expected format: