Dll file in 7.10

Hello
Before install new ldk 7.10
I have my file dll and it was working
And can call api throwgh this dll file
But after install new version 7.10
And got my dll file hasp_windows_xxx.dll
I got crashed message says
Hasp api dll dynamicaly unloaded with alive login before unloading the dll you
Must logout all the sessions calling hasp_logout
Or hasp_cleanup
Result in crash
So i used my old dll file
But need know why