Back to the Tungsten E

I started a new job in a facility that forbids phones with cameras. I have a Treo with Palm OS that I love but am willing to dig out my Tungsten E to have my drug guide and Taber's in my pocket. I don't care about the phone, really, since I work nights and my family can call me at the nurse's station if they need to. My problem is, I bought software from Skyscape and can't download it to the Tungsten because I've downloaded to the Treo since. I've pretty much accepted that I'll have to buy new software but wanted to make sure I haven't overlooked other possibilities before I do. TIA for any ideas you have.