@BetterRed
The hashes match my copy of "1.37".
I'll upload the file I have to Box momentarily.
Like you I don't keep much in the Downloads folder. It gets deleted, or moved depending on utility and file type.
I don't use a download gadget. 1.36 was not in the download folder at the same time as 1.37, but possible that Firefox remembered 1.36 and continued to switch, unseen, what it considered to be the same file as the "new" file.
I should have used Chrome to download the file and test, but I didn't think of that.