All versions prior to v3.6 run on Vista in compatibility mode and because of this the data files are stored in the virtualstore folder, this folder is only used when an application is running in compatibility mode with vista.
Now v3.6 is 100% Vista ready and doesn't run in compatibility mode, the problem however is that when upgrading to v3.6 there is no way for us to migrate your old data to the new data location.
With Vista you need to be very careful of how you choice your upgrade installation, if you use the old data location 99% of the time you'll run into problems because your user account will not have write access to this folder.
During installation you need to make sure you choose a custom install and select a data location within the application data folder branch.
You also need to manually move over your data files because there's no way for the installer or FlashFXP to do this for you.
We have an interactive demo located
here