As you may know, Xtreme Download Manager (XDMAN) is a java based download manager, with interesting features, like: the possibility to increase the download speed up to 500%, has pause and resume features, schedule downloads, has support for supports HTTP, HTTPS and FTP protocols, firewalls and integrates well with the popular internet browsers.
The latest version available is Xtreme Download Manager (XDMAN) 5.0, which has been recently released.
Up to date packages are available via some third party PPA, so installing the software on Ubuntu systems should not cause too many problems. Add the PPA do your system, update the local repository index and install the xdman package:
$ sudo add-apt-repository ppa:noobslab/apps
$ sudo apt-get update
$ sudo apt-get install xdman
Optional, to remove xdman, do:
$ sudo apt-get remove xdman
The installation instructions should work on Ubuntu 15.10 Wily Werewolf, Ubuntu 15.04 Vivid Vervet, Ubuntu 14.04 Trusty Tahr and derivative systems like Linux Mint 17.3 Rosa, Linux Mint 17.2 Rafaela, Linux Mint 17.1 Rebecca, Linux Mint 17 Qiana, Pinguy OS 14.04, Elementary OS 0.3 Freya, Deepin 2014, Peppermint 6, Peppermint 5, LXLE 14.04 and Linux Lite 2.