Export at startup?

Is it possible to export my Rainlendar entries as an ics file when Windows 11 starts up?
I’m hoping to, at Windows startup, transfer myRainlendar entries for the last three months to my Google Calendar (because that’s what my phone can see).
Any ideas?

The Rainlender file that contains all the entries is Default.ics (unless you created a different calendar) in

C:\Users<you>.rainlendar2\Default.ics

That is a regular calendar ics file. I think the Pro version links to Google Calendar in both directions, so you wouldn’t need to do anything. It would take care of it for you.