Please add file-types Any (*.*) and (*.txt) to the file-save dialog in the Export window for .tsv and .csv files.
The problem: I want to save my data to files with a .txt ending. However, in the case of tab-separated data, the ending .tsv is always appended to the file name, if I already written "myFile.txt". The default selection in the file value drop-down menu "Tab separated vales (*.tsv)" forces the addition of ".tsv" to the file name, so I end up with a file called "myFie.txt.tsv" !
It is common good practice to always allow load and saves to and from "Any (*.*)" file type in the file type selection drop-down.