I found some experiencing the same issue on the nexus forums, but seen no responses to it and one here on STEP forums, but I saw no follow up from the person having the issue.
It looks like the 'skyrim mods' folder that WB creates is not in the proper directory. Is it just under the'skyrim' folder which will be in the 'common' folder of the Steam install?
In need of some help: I've reinstalled Wyre Bash and now I'm trying to drag and drop mods into the installers and it's not working. I've even manually placed them in the installers directory and they don't show up. I've refreshed the installers tab and even closed out of Wyre Bash and re-opened it. Have I missed a step reinstalling it?
What version of WB are you using?
...\common\Skyrim Mods\Bash Installers
It worked fine yesterday, not sure what happened or how to fix it.
I'm using Wrye Smash 303? I cant find a version number, although there is no update via the update checker.