Cannot turn off write-protect in my flash drive

Hi,

I have been using a Kingston DTSE9 64Gb flash drive between my iMac and other Windows systems for some time without any problem whatsoever. It's has always been formatted in MS-DOS FAT32 format, and I've been transferring files between both systems for a couple of years. Suddenly, the drive has turned to be a read-only device without any reason. I have tried many solutions with no success, including terminal commands (both in Mac and Windows), downloading utilities in windows and checking OS settings, with no success. Other flash drives and SD cards I connect to my iMac function normally (read & write).

Is there any form of dealing with this in settings?