18.10 – Filezilla: Error loading queue

I am on Ubuntu 18.10 and Filezilla has caused me many problems. After the installation through the App Manager (outdated version), the shell (obsolete version) and the file .tar.bz2 of the website. I have found that only the file works.

But now I get one Error loading the queue and my credentials are not accepted (as with the outdated versions). I'm not sure what's up and troubleshooting will be frustrating, but at least I want to uninstall the version I got from the shell and see how well it works. The problem is that I do not know how. Any help?