Hi Steve,
With cameras like this the software of choice is BackyardEOS which is $35USD. No issues with Windows 7 - see link below.
https://www.otelescope.com/index.php?/home/&page=bye
It will make focusing and acquisition as well as taking darks and flats extremely easy.
I will contact you on your mobile and we can arrange to catch up and organise.
John K.