test v1.1(wp v2.71 ,set plugin folder 777)
go to configuration page (settings >> media)
upload the png or gif watermark pic
choose "enable options" and save (try some combination)
then some option lose (or all lose)
try several times, by chance, some option can be save, but no rule
can i know where the options save to ?into the datebase or config files ?
i think, use the config fils well have good compatibility, because some guy maybe use other db , like sqlite(by plugin), that will be some unknow problems.