Hi, I obtained an updated hoster plugin file and put it in the jd/plugins/hoster folder, but after I start JDownloader it is rewritten by the old one immediately.

Is it some kind of hidden file check/update? Webupdate is off.

All host plug-ins are automatically updated by jD when there is a newer version of these plug-ins. This avoids complaints about non-working plug-ins as this would cause a support nightmare.

But there has to be some way to use newer plugin file which is not yet available in the latest update.

If it is newer then it should replace the one in the SVN. Please contact support@jdownloader.org .

See also Getting started as a JD-Developer