"Compile error in hidden module: Declarations."

Greetings all! I am new here, and have come in search of help. I have scoured the internet and have not found an answer to my problem. Please help!

An requirement of one of the courses I am taking this semester is to use a Add-In. In case it helps, the course is Quantitative Business Analysis, and the Add-In is ExcelOMQMv4.7 z. When I downloaded, extracted, and opened the file on campus there were no problems. I was able to use the Add-In easily.

When I got home, I had forgotten where to download the file from and had went to the www.pearsonhighered.com/render website, clicked on the link "companion website" by the 11e, clicked the number one, clicked software, and downloaded QM for Windows, and Excel QM. This gave me a strange Add-In (that I can't seem to get rid of) called MyOMLab [see picture below]. I tried to disable the Add-In by going to File>Options>Add-Ins>Manage> and getting rid of that add-in, which seemed to work - however it is still in my Add-Ins section.

When I downloaded the correct file from the campus website and followed the same instructions of extracting it and clicking on the proper file to open it, it asks me to enable macros (which I do), and then it pops up with an error message: "Compile error in hidden module: Declarations". And will not display the Add-In.

It's been a few weeks of me trying to figure this out, and I am simply out of my knowledge zone here. Can anyone help me figure this out?

TL;DR: I have an add-in which I cannot remove, "MyOmLab". I have a error message pop-up when I am trying to open an add-in called "ExcelOMQMv4". I need that first add-in gone, and that second add-in to be displayed.

Add-In.jpg