Key 🔑: NTUSER.DAT\Software\Microsoft\Windows\CurrentVersion\Explorer\ComDlg32.
CIDSizeMRU- Tracks applications globally. MRU start at zero. Timestamp for the most recent item only. FirstFolder -tracks the install locations of applications, full path to the app, but no exact file name. OpenSavePidMRU - tracks files that were saved with Save As dialog, or opened with Open dialog. Tracks autocomplete terms. LastVisitedPidMRU - tracks the specific executable used by an application to open the files documented in the OpenSaveMRU key. Also tracks the directory for the last application accessed for each file in OpenSavePidMRU, tracks the location the file existed.