FOSS gamedev and creative worlds

OS - Windows 7 Homepack 64 bit
Game - minetest_game
Relase - MinGW 64 bit

Error log:
10:49:02: ACTION[main]: Server for gameid="minetest" listening on 0.0.0.0:54598.
10:49:02: ERROR[ServerThread]: SQLite3 database failed to open: unable to open database file
10:49:02: ERROR[ServerThread]: ERROR: An unhandled exception occurred: Cannot open database file
...

Do not install Minetest to your Program Files directory.
Put it on your desktop or somewhere else, where you have read and write access.

(or,) You can run Minetest as Administrator if you do (can) not move Minetest into other place.