Get SourceRSC to clean up the redirect?

As you may know, some of the major addons, most notably Wiremod, are streamlining themselves for the big update looming up ahead.
In light of this, I’m worried that files that are no longer present, or changed, on my dedicated server (because of the streamlining) will still be available on my fastdownload directory.

Since version 1.4 or something like that, SourceRSC doesn’t allow the RedirectCleaner flag on GMod servers, no matter what the config file says. This means that I can’t get at the files without completely emptying the folder each time there is an update.
Is there a way around that, or am I stuck having my auto-updating scripts remove everything from the redirect and filling it up again, causing quite a lot of downtime?