I've used Elementary OS Freya for years now, And me and my whole family used an instant messenger called Trillian, And now switching to Loki it won't install. to that I say WTF, why can't we install Trillian on Elementary os Loki?
I am going to assume that you are referring to the fact that there is no .deb GUI application to handle installs and therefore you cannot just click the .deb file.
I was able to install Trillian without issues by doing the following:
- Downloading the .deb file from their website: https://www.trillian.im/get/linux/2.0/linux.html
- Using Terminal:
sudo apt install /path/to/file.deb