Here is a suggestion of what how I would do it. Say you make a small update to vBShout 5.0.0. Create an announcement saying there is a new update out and explain what is changed, call it vBShout 5.0.1 etc...large updates would change the version to v 5.1.0.
Zip it and release it.
Unless I'm missing some part of the process that is time consuming or troublesome, this should be fairly easy to do.