I just downloaded a reverb convolution plug-in. I put the .dll file into the folder: /sleinberg/cubase essential 5/VstPlugins
But it does not show up as an available insert for an audio track or in the Plugin information window.
What am I doing wrong?
Did you set the path in VST2.x Paths? Is it Blacklisted? Check the Prefs Files link in my sig re: blacklist.
I do not know what you mean by this
But yes I did select the path.
There’s a blacklist.XML file in the Cubase App Data folder. See if it’s listed there. If so, delete the file and re-start Cubase.
System drive \Users< your username>\AppData\Roaming\Steinberg[Application]
I don’t have an AppData folder there.
You should be looking for the blacklist.xml file there. 
I found the file. the AppData Folder was “hidden” I will have to wait till I get home tonight to try it out. I don’t have my USB Key. What is the deal with the blacklist? What is the purpose of its existence?
To let you know if Cubase doesn’t like a plug. Like I said, sometimes it just takes another scan to be ok.
The plugin is still not working. I have deleted the file Vst2xBlacklist.xml 4 times and every time I search for it, it is still there.
It will always be there. The thing is, is the plug listed in the file or not?
Yes it is. Sir2 is the Convolution Reverb that I want to use. Is there anything I can do to not have it blacklisted or am I out of luck with this plugin?
I’m having exactly the same problem but with Waldorf Edition 1.7.3 on my Windows 7 64-bit, Cubase Studio 64-bit 5.5.3. I got the plug-in’s latest installer, a 64-bit version, from Waldorf Support, but no matter what I tried, the plug-ins (3 DLL files Attack, D-Pole, and PPG Wave) always get black listed. The 64-bit installer installs both a 64-bit version and a 32-bit version, but neither seem to register correctly with Cubase Studio 5.5.3. I notified Waldorf’s support and am waiting for a response. My hypothesis is that Waldorf’s new DLLs for this plug-in do not validate against VST standards.
Same here. I have W7 64 bit and Cubase 6 64 bit and can’t get Waldorf Edition to install. I have exchanged a couple of e-mails with their support with no luck so far. I’ve been desperately dragging the Waldorf folder to almost every “plugin” folder I can find. Nothing works. In my case it doesn’t appear in the blaklist file for some reason. Has anybody got the Waldorf Edition to work in 64-bit environment?
I did get this to work. The VST DLL files are fine, so my hypothesis was wrong. For a while, they were showing up in my xmlblacklist file. I wish I remember what actually fixed it. I now have a separate PC only for music where I have the UAC disabled. That seems to help. I would recommend at least testing it without UAC enabled. I can provide some details about my file locations and Cubase configurations if anyone wants.