sosensible - Wait for someone else to see it/search for it and then comment rather than 1up / bump, and especially avoid abusing the delete function of the forums.
Content is never lost (search works fine if you use the right keyword combination), so someone looking for "avatar maker" will find your post, and it looks like "random avatar generator" even led to another avatar generator for Beaver avatars ( www.scirra.com/forum/beaveravatargenerator_topic69196.html )
If you do have a real update to your program then sure, go ahead and add it as another post for people to find it <img src="smileys/smiley1.gif" border="0" align="middle">