First you must determine where your VST plugin .dll file has been installed. If you aren’t sure, the easiest way would be to do a windows search for the file. If this doesn’t help, uninstall the plugin, then reinstall it again and pay close attention to the installer. In most cases, the installer will ask you what location on your computer to install the plugin.
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Cubase & Nuendo :
Go to Device > Plug-in Information and click the VST 2.x Plugin Path button. Then click the Add button and select the folder your VST plugin is installed to. Press OK, then click the Update button.
Go to Utilities> Cakewalk Plug-in Manager. In the VST configuration section, click on Options then click Add and select the folder your VST plugin is installed to. Press OK and click the Scan VST Plug-ins button.
Go to Options> Preferences then click File Folder on the left side. Click the Browse button and select your VST folder. When it has been selected, click Use VST Plug-In Custom Folder to make sure it is turned on. There may be a delay when you click the option, but it may be scanning your plugins already at the bottom of the Ableton screen in the left hand corner.
Go to the Studio One menu and choose Options, or just press the ctrl key and comma key on your keyboard to open the options window. Click on Locations, then VST Plug-Ins. Click the Add button and select your VST Plugin folder. Press OK then close and re-open Studio One. If you still don’t see your plugin, go back into that screen and click the “reset blacklist” button, then close and open Studio One again.
There is a visual walkthrough available at this link:
Click on Options> Preferences> VST Effects. Click the Browse button next to the Default search folder then add your select the folder where your VST plugin is installed. Click the Refresh button at the bottom of the page and you should see it appear in the list in the center of the window.
First you must be in Edit view. You can click on the Edit button on the top left corner of Audition to get there. Then go to the Effects menu and click Add/Remove VST Directory . Click the Add button and select the folder where your VST plugin is installed to. Press OK. If you don’t see your plugin, go to Effects> Refresh Effects List.
To add a new VST instrument into Finale click on MIDI/Audio> Device Setup> Manage VST Plug-ins. Click the Add button and select the folder where your VST instrument plugin is installed to. Then click the Refresh Plug-Ins Lists button. To use VST plugins, make sure that the Play Finale through VST option is checked under the MIDI/Audio menu. To choose your instrument go back to MIDI/Audio> Instrument Setup> VST Instruments. Select your instrument from the drop down box. To open the plugin, click on the pencil icon to the right of the drop down box.
Digital Performer 8.0
Go to the Mixing Board screen, right click on a track insert and choose “Audio Plugin Preferences”. In the section “Additional VST Plugin Folders”, click the Add button and choose the folder that you’ve installed your plugin into.