Description of my issue:
This is in response to ticket #25244. I am having the same issue where the final restoration gets stuck while updating the .htaccess file. I updated to Akeeba 5.1.0.b2 Pro, took a new backup, then restored it and everything worked fine.
The worry I am having is this: are all the backups I've taken while running Akeeba 5.0.4 corrupt and unusable?