Welcome to the community. You’ll find a lot of helpful resources by doing a simple search on our forums. Here’s a perfect example:
Search Results: http://audiojungle.net/searches?term=software&type=forums
Unfortunately once an item has been giving a rating there is no way to remove or revise it from the item’s overall rating. We recommend that all buyers rate files after careful consideration and are accurate when selecting the correct star, as the rating will be committed to the system immediately and permanently.