If a single-file installer (downloaded, emailed, or other file transfer) gives an error such as "This is not a valid win32 application" or "This app can't run on your PC", it might be an incomplete download. (If needed, Wasp Tech Support can confirm the proper size of the file.)

For example, the downloaded Labeler v7.1.5 patch.exe file is 3.93 MB. The expected size is 56.5 MB, and Windows will not run it.