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For QuickBasic to work on Windows 10, you will need DOSBox, apparently.
Here's the site to get both working
On that site, steer clear of everything that says 'download' except the gray button, with the DOWNLOAD legend in blue, near the center of the page. That will download the needed 'stuff' to run a QBasic program on Windows 10. It even says it is tested on Windows 10, so that's quite promising.
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What file viewer did it ask for, or, a file viewer for what type of file?
Perhaps that's just the README file it needed a viewer for?
Let me know, please.
It seems to me that another Expert took up and accepted your request for Secure Remote Assistance.
In which case, we must wait (for a while) for that Expert to contact you (if that Expert has not already done so.)