I deleted all entries in library and Debug path in Delphi, and search Win64 path in %PATH% system environment, but with no difference.
Then I added new platform Win64 to project and recompile. Program then ask me to add ibclient64.dll and ibtogo64.dll to run. But Backup tool still not working.
But application uses FireBird 3.0 database (and that server is installed), but many years ago someone decided to uses IBX component to connect with that database. Maybe I shouldn't install Interbase ToGo from Getit package, should it works without it ?
If I copy Win64 dll's files, I have error, that tell connection was rejected by remote server. After change dll fbclient.dll to ibclient64.dll I got problem with service manager.
So maybe I have wrong dll's included to application folder, not in Delphi path ? Nah, it doesn't make sense - DEBUG and RELEASE Win32 application uses the same path and dll's files.