Click the "Choose File" button and navigate to your .dnd4e file and select it
Click the "Upload" button
Check the character on the import site to make sure all the information came through correctly, unfortunately the import process from a .dnd4e file is just a good first step, there will still most likely be some things you'll need to update.
Go to the Settings app on your device and find the i4e section, enter the same email address you used in step 2
Launch i4e and tap the import button, your character should now be listed there ready for import
Select the character you wish to import and it will be imported into the i4e application
Q: Why doesn't all the information for powers get imported?
A: Unfortunately, some of the information about powers aren't included in the .dnd4e save file mainly the following; description, range, keywords.
Q: After import my (weapon, implement, item, power, etc) isn't entered correctly
A: Unfortunately the .dnd4e file doesn't include everything that would be useful for re-constructing a character, a lot of the import process is dependant on (hopefully) educated guesses to put the puzzle back together.
Q: How do I request a new feature?
A: Send an email for each feature you'd like to request to i4e_bugz@cordax.net and they will be logged