Community vs Subscritpion

Is bar file updatable in subscription version

Hi , i am using bonita community version and i wanted to make few changes to few of the tasks created in my bpm but i am not able to do that. I wanted to know is it possible in subscription version to update the same process version in bonita, or if i can move the tasks created in my old process version to new process version ( not talking about new bonita version, just few changes to the old tasks and functions).

Community edition limitations

What are the Community edition limitations?
Where can I find the differences between Community and Subscription editions?
Thank you