I successfully installed the WE demo on an HTC Mogul using a 512K SD card. Loved it. Bought an 8GB SDHC card and downloaded the full version. I've tried to install WE several times (likely did something wrong, but not sure what that was), and always have the same problems. I've tried uninstalling the program and reinstalling, which seems to go smoothly. Regardless, the sounds don't work (I tap the speaker icon and nothing happens), under similar sounding on the Sounds tab the words "no data" are displayed, and when I tap the Species tab I get the error message: "An unexpected error has occurred..."
I did not uninstall the demo version before installing the full version. When I uninstalled the full version in order to try reinstalling it, I noticed that the PB folder was not deleted from the SDHC card. Don't know if that matters.
Oh! One more thing ... I tried putting the 512K SD card back in the device and found I could run the demo version. Sounds worked; no errors. So, had an idea that maybe I could copy the full version PB folder on the 512K SD card, and then the full version would work. Nope. Just got an error message asking that I insert the correct card.
Any help will be greatly appreciated. I'm dying to start using WE in the field!