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This seems to be a very severe issue. However, I cannot duplicate the problem. Please provide more detailed info:
(1) Your operating system version, and ideally a screenshot showing the problem.
(2) Please click Advanced in the Drive Mapping Tool, then click Event Log and "Send Event Logs to Support".
(3) Does it only happen on one computer or multiple computers?
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If possible, our engineers like to check the problem remotely. Please contact DriveHQ support directly via email. You can also try to reset (delete) the Drive Mapping Tool settings:
(1) Quit the Drive Mapping Tool (DMT). (From the Windows notification area, right click on the DMT icon at the bottom-right corner of your screen, then select Exit. )
(2) Stop the DriveHQ WebDAV Proxy Service. (Type in "services.msc" in the search box at the bottom-left corner, or run it from a command window. Select the service and then click the Stop icon.):
(3) Delete or rename the folder:
C:\ProgramData\DriveHQ\WebDAVcache
If the problem affects other DriveHQ programs, you can delete/rename the folder:
C:\ProgramData\DriveHQ
After the above steps, you can restart the DriveHQ WebDAV Proxy service and then launch DMT again. If the problem is caused by program data corruption, this usually can solve the problem.