WP-Malwatch not working with Multisite?

I’m getting an error message at the main admin page (https://domain-name-here/wp-admin/plugins.php), and clicking on the link in message gives a 404 error. I’ve googled the error and found this page on the plugin author’s blog, which seems to say that they’re working on a fix for wordpress 3.0, and the current download page on www.ads-software.com shows that it works up through version 3.0. Yet, I’ve had this error since version at least 2.9.2, and now have version 3.0.1. Anybody seen the same thing with WP-Malwatch? I posted a couple messages on the author’s blog, where other users were seeing the same thing, but they haven’t been approved.

Specifically, I get the following message at the top of the page when logging in as admin, at the plugins page:

For WP-MalWatch to work appropriately, the upload directory must be set to the default WordPress value of wp-content/uploads. You can change the value here.

and when I click on the link for ‘here’ (which sends to https://domain-name-here/wp-admin/options-misc.php), I get:

Not Found

The requested URL /wp-admin/options-misc.php was not found on this server.

1. I try looking for options-misc.php in my install of 3.01, and find nothing, which makes sense that the file really doesn’t exist in this version. My guess is that this page was only applicable in an older, non-Multisite version of WordPress, where there was only one uploads directory and not multiple directories for multiple blogs? I realize I could go into the options for each site and make them all the same, but I’d prefer not to do that, not just due to security but that I shouldn’t have to do that.

2. I poke around in the WP-Malwatch code for the error message, and find this in wp-malwatch-folder-here/views/administrative-warning.php:

For WP-MalWatch to work appropriately, the upload directory must^M^M
        be set to the default WordPress value of wp-content/uploads.^M^M
        You can change the value <a href="' . admin_url('options-misc.php') . '">here</a>.'

If I change it to this:

For WP-MalWatch to work appropriately, the upload directory must^M^M
        be set to the default WordPress value of wp-content/uploads.^M^M
        You can change the value <a href="' . admin_url() . '">here</a>.'

and reload, the link sends me to the main admin page, but the error still appears at login, i.e. WP-Malwatch thinks it isn’t fixed. It seems to me that this function call is referring to a page that doesn’t exist.

3. The closest I saw to my situation is on the author’s blog, where someone else posts that they get the same symptoms, and the WP-Malwatch author suggests that they reinstall, as there’s something corrupted about their system. I know that can’t be the case with me, because as I note above, there is no options-misc.php in my version of WordPress. Even if I did do a fresh install, I don’t think it would solve the problem.

Has anybody else seen this, and what have you tried to fix it? Could it be that this functionality in WP-Malwatch doesn’t work for 3.0 yet?