May 8 (SeeNews) - Fitch Ratings said it has upgraded the long-term issuer default rating (IDR) of Slovenia-based Abanka d.d. to 'BB+' from 'BB', and thе ratings of Nova Kreditna Banka Maribor (NKBM) and Nova Ljubljanska Banka d.d. (NLB) to 'BB' from 'BB-'.