What do mean by basic upgrade

[mukesh]

IF some plugin you develop like affiliate so I can upgrade ?

Or other plugin with basic upgrade

[Michael]

2 hours ago, mukesh said:

IF some plugin you develop like affiliate so I can upgrade ?

Or other plugin with basic upgrade

It depends. If you have an owned license and the affiliate comes out after and it needs a base version which is higher (like the mass mailer will work only on 4.0.0+ because it uses the new framework then yes you need to renew expired support and updates). Otherwise you can just upload the plugin to your installation and it will work as normal.