Troubles sending books from Calibre to a Kindle Fire turned into a Android 4.0 tablet
I have a Kindle Fire e-reader and it has been working fine with Calibre for long time. Now I have 'upgraded' the Fire into a custom ROM of Android 4.0, so it is now simply an Android tablet. It works fine and I've installed the Kindle app and it works fine with books downloaded from Amazon shop or books manually saved into 'kindle' folder.
The problem is that Calibre saves the books in 'Documents' folder, and the Kindle app doesn't find them.
I've tried to set the device as an 'Android tablet with kindle reader', but still Calibre detects my device as a 'Kindle Fire', so it avoids the custom configuration I set for the 'Android tablet'.
So, my problem is that Calibre treats the device as it actually is, not as it is currently working. So, is there any way to ask Calibre to save the books to other folder, even detecting the device as a Kindle Fire?
Thanks in advance