Script Timer is no longer for sale and is not being further developed. I have tested the last version of Script Timer, 2.7.1, in macOS Sierra (beta 5) and it appears to be fully functional.
With the sudden demise of our payment handler and license code distributor, kagi.com, even old copies of Script Timer are no longer for sale since they cannot be registered. If you are a registered user and have a support question, I will still try to help out but can't guarantee the timeframe. The Script Timer pages will remain on this website as a reference for the program for currently registered users. I will also keep the database of registration codes and copies of several versions of the .dmg installation file in case any registered user should lose theirs.