Bought a game, installed it, but it doesn't work. A green bug occures and says about the problem with xrCore.dll.
The log of crash is here:
Expression : 0
Function : CLocatorAPI::LoadArchive
File : D:\prog_repository\sources\trunk\xrCore\LocatorAPI.cpp
Line : 340
Description : unsupported

How to fix it? Should I download strange xrCore.dll from somewhere?

From googling this, it appears that mostly Russians have this problem.
This website here advises to delete the file thumbs.db from the game directory (or sub-directories).
...hxxp://modders-wiki.ru/xr:Line_340

Note that this file is hidden by default, you need to display "system files" and "hidden files" in Windows.