Upgrade pgadmin 4.0 to 4.5

Hi,

While working with PgAdmin Tool 4.0 getting POP up alert saying that we are using version 3.5 of 4.0 however the current version is 4.5.

Our environment is PostgreSQL 9.6 version on windows Server 2012 64 bit version.

When we are upgrading to version 4.5

1.Is there any down time required?

2.Is there any change in Postgres DB Pgadmin engine tables change??

3.And what are considerations we should follow in before upgrading to 4.5 ?

Thanks and regar

satya

+919036530204