Trial Watermark still present on purchased Premiere Elements 2021

Hi, I am making a project using Premiere Elements 2021 which I purchased on July 10, 2021.  For some reason, everytime I open the program, the following pop up appears asking me to sign in.  I follow the instructions by entering the serial number I received when I purchased the product, which I accessed from my account. 

After doing this, the pop up dissappears, and I'm able to run the program like normal.  But unfortunately, when I edit a project, the watermark that says "created using Premiere Elements trial version" still appears on the display screen as shown below.  I have tried a couple of suggestions I found saying to deleting rendered files and re-render the project, as well as cleaning media cache files.  Neither of these solutions seem to work.  I am hoping I can get another solution to get rid of the watermark.  It shouldn't be showing up after I put in the serial number.  And the pop up prompting me to enter my serial number shouldn't be showing up everytime I open the program since I have already purchased it and have been using it for 2 years.  Thank you for your time.