Below are the locations of various files written (and read) by Nsight Tegra, Visual Studio Edition 3.0:
Logs - %AppData%\NVIDIA Corporation\Nsight Tegra\Logs
Nsight Tegra.log is the current log file which gets archived every time you relaunch VS. Only last 10 log sessions are archived.
Android Log (logcat) window state and filters - %LocalAppData%\NVIDIA Corporation\Nsight Tegra\Settings
You can share the Android Log filters with your coworkers by sharing the logcat_filters.xml file.
Device files and settings - <DeviceID>
Here is the value of the Tegra > Options… > Tool Locations > Location to store device files property, and is the ADB device ID. Nsight Tegra tracks APK installs and persists them in the installed_apks.xml file. You can remove this file if Nsight Tegra has problems with recognizing the change in an APK. Device files are stored in the symbols32 and symbols64 subfolders. Nsight Tegra does not track changes in the system files on the device, which is why you may need to manually delete their local copies when you modify them.