Hello Kelly, this is Emily.
This looks to be an incompatible issue. I took a quick look on the Singer software page for their OS requirement, none of them seems to support Windows 11 as of now. You can take a look and see if one of these is the software you are trying to download? https://futura-support.com/node/all/software
I think it is best to reach out to Singer support to confirm the compability of their software with Windows 11 platform. After all, this is a 3rd party software and we don't have the expertise or knowledge needed to troubleshoot their product. Thank you for your understanding.