I have used Regshot 1.9.0 relating to the app TeamViewer Portable 8.0.16642 and in the report was noted in the section "Files added" the following content:
C:\Dokumente und Einstellungen\Andreas Piatek\Lokale Einstellungen\Temp\nsh3C.tmp\Registry.dll
Due to this report I must assume, that TeamViewer Portable 8.0.16642 leaves a folder with content (here: nsh3C.tmp\Registry.dll) in %LOCALAPPDATA%\Temp. After restarting my computer I found however, that this folder was gone. Accordingly are the results with Regshot 1.9.0 not completely sufficient.