

Install the prerequisites for installing from source: Build and install Filezilla 3.49.1 from source:

It is probably best to remove any version that was installed with apt since it might try to "upgrade" back to the older version. It is recommended to install Filezilla from source or through the apt-get install method (which will be an older version). I removed the section below that contained how to replace your installation with the precompiled version since it really is outdated now. Ubuntu 18.10 and newer contain the newer libc6 and are not affected by this. If you are running Ubuntu 18.04 LTS or older, the libc6 library does not contain GLIBC 2.28 which is now required by the precompiled version of Filezilla 3.49.1.

NOTE: The newest precompiled version of Filezilla is now 3.49.1 which was built for Debian 10.0 (Buster).
