update

[TRACY KETRON]

i have open office 3.0.1 installed on my MacBook OS 10.14.3
CAN i update my   open office? 
or do i have to download open office 4  ?     if i download the new version 
will all my documents etc from open office 3 automatically move to my new 
version?
or how do i do that?
thank you thank you thank you!