The softwares are usually installed in bin folders, in /usr/bin, /home/user/bin and many other places, a nice starting point could be the find command to find the executable name, but it’s usually not a single folder. The software could have components and dependencies in lib,bin and other folders.

Where are applications stored in Linux?

Linux ‘Program Files’ are in the whole hierarchy. It could be on /usr/bin , /bin , /opt/… , or in another directories. I think you are going to find some file related to your application.

Where are applications installed in Ubuntu?

There’s still a set of ‘standard’ locations that programs are put into. For example, binaries (in windows parlance ‘executables’) are put in /usr/bin, and documentation is put in /usr/share/doc in a Ubuntu system.