Downloadable from Contec, can be difficult to find, but is there. Review irrelevant; it's the only option (have given 5 stars as I have to give something). Software is OK, but I have great difficulty in printing the output (others may have better luck). While it won't save its output, you can print to PDF. It's not obvious, but Menu File > Derive data produces CSV file to import into spreadsheet manager.
Michael again: Update: the version of the file downloadable from Contec is 5.3.4; this version has difficulty printing the report. Sometimes it works once then fails, reporting a problem with PRT.EXE. There are later versions of the software, but they seem impossible to find now; they do print properly. Possibly Contec help can provide; but they ignored my request. Hardware: the cuff supplied with the ABPM50 is very difficult to fit to yourself; it can be replaced by a much easier to use cuff with a metal D-ring, as supplied with all "personal" blood pressure meters.