En Vogue cheated on their record label and cost them over $100M ... so says the company suing the group for leaving them high and dry for another label. According to the legal docs ... Rufftown Entertainment owner Rene Moore says he doled out $190K to front a huge En Vogue comeback in 2010 with OG…

Singer Maxine Jones -- who was kicked out of En Vogue two years ago -- is blaming her old band mates for her massive debt and bankruptcy. Jones was ordered by a judge last year to stop using the En Vogue name ... which led to her filing for bankruptcy. She said she was over $100K in the red. In…