The OCLP app resides in the Root/Library/Application Support/Dortania folder after the Root patches, and there is usually a link in the apps folder (like an alias, maybe a symbolic link, but it often shows up at the top of the file/folder list if you have the Applications folder set to show as a list). I have made an alias for the app in the Dortania folder and put that alias in the Applications folder, but it shows up in Alphabet order under the Ns.
Of course, redownloading the app is possible too, but it may not be necessary. Check that Library location.
I think the devs have done an incredible job on this project, and if possible I hope they can make the installation procedure a byte more bulletproof. As it is, the Root patch installation procedure is not always correct. After installing 13.2 and 0.6.1, the Root patcher downloaded the KDK for 13.1 instead of the kit for 13.2 and that messed up the install royally. Had to delete the contents of the EFI partition with the MountEFI utility, do a PRAM reset, and reinstall OCLP 0.6.1, followed by the Root Patch again to get the system running correctly! All is well now, so I told myself, keep your hands off! Leave it alone and hope it stays alive and well.