Problems after update from 5.05 to 6.00 version

After update Cash desk shows prices in thousands (it don’t recognize comma separator) where I can change it? In Earlier version was all prices ok.
Also I cann’t create invoice (can’t add date). From my adroid phone I can add date, but after adding product I got this error: "Out of range value for column ‘tva’ at row 1.

This I fix like this comment what I found:
Go Home-> Setup -> Other setup and add line
Name -> MAIN_OVERWRITE_TRANS_xx_XX
Value -> SeparatorDecimal:.,SeparatorThousand:,

where xx_XX the language you are using

But I have one more problem, I cann’t add date creating invoice, just pressing date shows nothing it don’t work anywere in program and after confirm invoice I got this error:
TCPDF ERROR: Could not include font definition file: freemono
I checked TCPDF/ fonts and there are all needed fonts freemono too.