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Ok, maybe it is. But the vigenere password is not vgnrieee.

The transposition cipher works by lining up the plaintext in 4 columns, with a minimum of 2 rows. Then you use X to complete the incomplete rows. The Vigenere password is supposed to be:
vige
nere
= vniegree
I misspelt vigenere as vignere while encrypting it, so the password is 

vign

ereX

= veirgenX

I'm sorry about this, X should have double-checked his passwords. Thanks for pointing this out. Please do let me know if there are other issues

Is the congratulations.txt password not mslqvydyjkxgyrq ?

(+1)

You are very close to the password. 'congratulations'.txt is the hint. It's a curveball!