I tried to install a previous version which was unsuccessful. So I found the newest version. There is no log file in my Modules folder. When I opened FSX, it asked me permission for a few things and I approved them. The FSUIPC4 installation was successful (thats what it said).
My DLL.XML file has this
<?xml version="1.0" encoding="Windows-1252"?>
<SimBase.Document Type="Launch" version="1,0">
<Descr>Launch</Descr>
<Filename>dll.xml</Filename>
<Disabled>False</Disabled>
<Launch.ManualLoad>False</Launch.ManualLoad>
<Launch.Addon>
<Name>FSUIPC 4</Name>
<Disabled>False</Disabled>
<Path>Modules\FSUIPC4.dll</Path>
</Launch.Addon>
</SimBase.Document>
This was very frustrating until I started eating a piece of cake. But I still need help. Thanks everyone.