Under “VST plugins extra search folder” click the folder icon to select your VST folder. In FL Studio, click “Options” from the menu bar and select “File Settings”. To do so, right-click FL Studio and choose “Run as Administrator” and click “Yes”. In order to properly load and register Sylenth1, open FL Studio in “Administrator Mode”. Use the 32-bit version of Sylenth1 only if you’re using the 32-bit version of FL Studio. If you’re using the 64-bit version of FL Studio, make sure you install only the 64-bit version of Sylenth1.