JoomlaXplorera is very usefull for me... I can remove a whole folder within a click. I dont have to wait at all and its gone!
I can change every single permission. I allways had problems with that before. Also I can finally delete files I could never access anymore, like /cache/.htaccess of a very old forum, I could never remove until now .
I came up with a work around for this, download the whole template folder, rename it on the server and upload the original again. Seems to work. I will try joomlaXplorer too though, sounds easier.