Measurement and Automation explorer Database Connection Error

[sfmitf48]

Hi,

It is the problem of the software called Measurement & Automation explorer(MAX).

When I open it, I cannot expand the 'devices & interface'

And there appears a MAX Database Connection Error and says there is was a
problem

connecting to the database.

And refer to KnowledgeBase article 42HG08DD.

I have tried many ways on the Internet but I failed to solve the problem
The MAX worked well last week.
I have used it for a long time. This is my first time to encounter this issue. 
I totally have no idea about it.
I have tried the #2 method. Both NI Configuration Manager or NI Device Loader 
(nidevldu) Services are started. But the issue still exists.
The MAX version here is 4.6.2.
Can someone tell me how to fix this issue?
Thanks

[nyc_(is_out_of_here)]

http://digital.ni.com/public.nsf/allkb/86256F0E001DA9FF86256FFD005B827C 

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z000000P8awSAC&l=en-US

[sfmitf48]

Is this the only way to fix that issue?

Thanks,

[FoxSquirrel]

Removing the MAX Database Corruption that was mentioned by nyc is going to your best bet with this.