I coded a CRM application in Delphi some years ago and worked with it. Now I reinstalled my computer and the only thing that changed was the Username of Windows 10 itself. Result is, that I cannot access the Firebird 3.0 db anymore and I have no idea what the problem is or might be, because, as far as I know, the Firebird 3.0 Embedded librart does not perform authentication.
Has anybody an idea?
There are tools to inspect access to your DB. Starting with Firebird 3 there is a new more secure way to access databases. If your application use "old-school" (Firebird 2.5 and earlier) connection way you should provide legacy Authentication