Could you describe what happens please?
I understand that you canceled some files, but i don't see what you did... Which is the missing file?
It seems the whole installation of ETL is in your home directory even the hidden directory. I do the same, it's easier to manage...
If you deleted some system files you should reinstall it
If you deleted archive files, you could download the ETLegacy Linux 64bits binary and decompress it in your ETL directories. In any case that what you could try first... https://www.etlegacy.com/download