It looks like you're referencing a string of text that resembles a file name or a download link for something called with numbers 5.00 , 19 , and the word Download .
For example, a fictional piece based on your string: – that’s what the installer screen said. File 19 of the download package. I clicked, waited, and the progress bar stuttered at 47%. Then it finished. No fanfare. Just a folder named Pl . Inside: one .exe, one readme, one mystery. Would that work, or did you have something else in mind?