Hi. Sorry to hear that you're experiencing issues.
Can you please let me know what the name of the .dll is?
You can email me at: owlyboigames@gmail.com
Or just reply here. :)
Do you perhaps have 32-bit Windows?
If so, please use "MyStepbroIsAFemboy-32.exe" instead.
I loaded the dlls but this time it gives an error saying "C:USERS\(mypcname)\temp\desktop\(gamename)\(gamename).exe not found in dynamic link library"
Can you please check if your anti-virus is perhaps blocking the .exe
Do other VNs made in Renpy run on your PC?