bootcamp partition disappeared - please help!

Hi!

Unfortunately I lost my Bootcamp Partition on OS X - in Disk Utility it´s shown, but greyed out, cant be activated. Another (assumingly connected) problem is - I can´t see external NTFS Harddrives anymore.

Paragon NTFS for Mac is installed - everthing worked perfectly till i got those problems a few weeks ago... didn´t do any OS X-Update (currently Sierra 10.12.5), but had to rewrite Windows MBR because of an error while booting into Win - that´s ok now, Mac & Win bootable and working proper except the mentioned problems on OS X - this is beginning to bother me...

Please can u help me, if possible by LonerT? :)

Thanks & Cheers, Greg