I am doing this because the apps have diverged so much that it is becoming too difficult to support both to the level that my users deserve. There are many advanced features that have been requested which are already present in FlickrCompanion, and by focusing my efforts on that app, I can provide you with the features you want and focus on adding newer, even better features.
If you have enjoyed using FlickrFree, you will love FlickrCompanion. This app will remain on the market, and its source code will always be available on Google Code. But it will probably not receive any further updates; all of my efforts are now being focused on FlickrCompanion.
Thank you for your support, and I hope you enjoy the new app!