This is possible through using a week <number> scheme with numbers because odd or even numbers. Note however that the NAS will powerup automatically every 6 days to rearm the timer, then stop automatically, because of a firmware limitation.
4.3 is exactly the nightly build, so no need to remove/install the newer. If you remove the nightly build, I believe you will lose your settings.
Updated Changelog
Release 4.3
Removed failing test for unknown reason (issue with array ordering)
Fix for https://sourceforge.net/p/advpowermgr4ds/bugs/36/
Hi Jürgen, advpowermgr-DSM7-4.3.spk has been released right now. Regarding taking over the project, I have no contact within Synology, I tried some years ago with no success. All we need is some Perl developer, or the application to be rewritten in Python. This is feasible but requires time. If anyone is interested, I'm ready to spend time on providing rampup/support.
OK let me build an official package then