I'm a new customer. Just bought the Prof version a few weeks ago. I use the PDA when I'm on trips. When I return, I sync with my laptop,....then purge the data and start over again on the next trip.. This worked fine twice. At the start of my third trip I found that I couldn't make any entries because the "type" field is empty. For some reason the "type" field dumped.Thetype fieldused to have several airplane types in it. The type field on my laptop still has the appropriate aircraft selections. Can you help?