A couple of weeks ago I was starting to write a Windows Support section for the manual or website. It is still a work in progress. But here is a section that helps answer your question.
##Install file locations
The install of darktable creates the following folders:
-
C:\Program files\darktable- the program files to run darktable -
C:\Users\<username>\AppData\Local\darktable- Configuration, databases, styles, and backups files are stored here. These include the darktablerc.txt, data.db and library.db. -
C:\Users\[username]\AppData\Local\Microsoft\Windows\INetCache\darktable\for windows + 10
C:\Users\[username]\AppData\Local\Microsoft\Windows\Temporary Internet Files\darktable\for windows 7 Hidden folders in Windows, therefore copy and paste the link to find this. - OpenCL kernel, thumbnail image cache and the logfile. These are all safe to delete if needed.
##Troubleshooting
darktable uses a logfile output option that enables some troubleshooting. To invoke this ability, you will need to start darktable with -d and multiple options described in the manual (eg. all, perf, openCL). The simplest way is to go to windows run, cmd and type darktable.exe -d perf . The log file will be generated in the hidden path listed above.