In the attached file, if we click “+Add Versions”, all the version should appear. However, in my Launcher, only 4.17 appears. What is the problem? Help me please.
Just to clarify, did you click on the dropdown arrow on “4.17.2” and got no other options there?
If you did not, that should let you pick which version to install.
click add versions and it will show a grayed out tab. click the version number on the grayed out one and you will see a drop down that shows all the old versions (final releases at least). just select one then hit install.