Try the Download button in the back-end of Akeeba Backup (in the Administer Backup Files page). It should have the same issue. We ask PHP to "channel" the file to Remote Control or your browser. Due to server and network limitations (memory limits, Apache and PHP timeouts, network transfer speed), this may fail. The only workaround –as I've written in the User's Guide, the Quick Start Guide and explain in the video tutorials– is to use FTP in Binary transfer mode.
I am going to drop the download feature in Remote Control because of all the problems it creates. It's not just the download of big files that breaks, there also some very grave memory leaks because of the way Titanium Desktop (well, actually, Javascript) works. There's no point for me wasting much more time on fixing what can't be fixed, especially for a product that generates no revenue.
Nicholas K. Dionysopoulos
Lead Developer and Director
🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!