I have a question. Before when I downloaded a TAR file plug-in, extracted it and made some changes to files. Then created the Tar file archive again. When you upload it to use on your site, you get an error and and are unable to install the Tar file plug-in. The only way I've been able to make some file changes to a TAR plug-in (that still works) installing it on your site - is by using 7zip and making changes to files without extracting the TAR file, as 7zip lets you edit files inside a TAR archive and rebuilds the TAR with every change made to files without actually ever extracting the TAR file.
There must be a way to fully extract a TAR file, make changes to files, then rebuild the TAR and the plug-in still work when trying to install it afterwards on your site? But it's as if, once you extract a Tar plugin it then loses something that stops the plug-in from working when you recreate the TAR again and try and install it. And only editing files inside an un-extracted Tar file with 7zip works because you never actually extract the Tar, it simply just gets rebuilt instead