Feel free to upgrade to the latest version. Here's the description on the developer's website:
iFile is now ShareWare. The reason is that asking for a donation does not really fit since I actually require that at least a certain amount of users will send me some money, call it donation, registration fee or whatever.
It will work the following way:
* Release 1.0.1-1 allows users to register their copy after having bought it in Cydia Store.
* All users who already donated will of course become automatically registered users. If you have NOT received an email from me calling you registered users, means that I somehow missed your donation - PayPal did not send out some of the emails as it seems. Please send me an email through Cydia and I will check my PayPal transaction log.
* A user can register up to 3 devices.
* Users who won't register will still see the pop-up once a day, but iFile will continue to work for them as today.
* If too few users register their iFile copy, I might release new features only to registered users and to all others one release later.
* Existing "free" features will always stay "free" without registration also in future.