Plugin versioning

Ground Control Software Mission Planner
1

Hello.
I made plugin for MP 1.3.37.
This plugin works on .37 and .38 but not working on previous (i checked 1.3.30, 1.3.20)
How plugin versioning works?

2

there was a change the the plugin api to include new fields, the api should be pretty static from now on.

3

Do you remember which version?

4

Mission Planner 1.3.36

5

the change was around the return type from void to int when inserting/adding wp’s