Macros are executed permanently

[mus]

Excited to learn that macros are now supported. But i can't find anything on when or how they are called.
When i add the example macro https://api.onlyoffice.com/plugin/convertingvbamacros to a spreadsheet, it is obviously called every time i update a cell, since the resiults change every time. (in OO 5.1 desktop, Mac)
Now how do i write a macro that's run only once?