[Temporary workaround is here. Linking from the root post to help people find it. --Leo]
I have been using Directory Opus for many years (and the Amiga version back to the 1980s), with no problems.
Today I installed Windows 10 Pro Insider Preview Build 14376 and am now receiving the following error message every few minutes:-
Presumably this must be caused by a change in the Windows O/S, but I thought I had better let you know because it is expected that a new update for Windows 10 will be sent out to all users in the beginning of August and you won't want every user emailing you.
Regards, Mike Simpson
Penrith, NSW, Australia.