You shouldn't have removed LR.
PLease take this as constructive but you need to slow down a bit and debug the steps recommended rather than creating new.
The screen shot above does not show a catalog. That's partly because Microsoft is "helping" you and supressing the file type in the display. I recommend you turn that feature off (control panel, File Explorer options, View, Advanced, un-check "hide extensions for known file types", while there you might want to also show hidden files, not hide empty drives, not hide merge conflicts, not hide protected files). note none of these things is your problem but may be lending to the confusion.
You need a FILE that is of type .lrcat. It is perhaps inside the folder shown above, if that is where you unzipped the zip file. If you click on a folder it will not invoke lightroom (who knows what it will invoke). Find the file. Better still, find the backup restored from Backblaze if you indeed had it backing up the catalog. April 2019 is REALLY old. You must have a newer one, right?
Install LR 9.2.1 again.
When it starts it will start with an empty catalog, likely, or something old from the default name. Ignore that. Go to File, Open Catalog, and find the catalog with the .lrcat file type that is the latest.
Tell us what happens after those steps.