[cumapart]

why are you changing ext. could be your problem, I use winrar drag file out of archive (after entering password) to desktop, edit that with cal .... when done drag file back into original archive and save, works for me, also make sure your for example ‘parent’ files have the right ‘date’ and are competible with the insite you are using, there is sw available to convert newer in cal disks to work with older insite and also keep the dates fresh so expiry is kept at bay