Impossible to update X Word yo version 1.5

The pinwheel just spins forever, but nothing happens. If you trash the prior version (1.4.1) & click on “instal, what AppStore does is instal version 1.4.1, rather than 1.5. If you then Quit AppStore & relaunch it, once again it proposes to update the version it just installed to 1.5.
The worst part of all this is that no one in Apple’s various support teams takes responsilibity for what i describe above. It took forever for various among the support people w. whom i dealt, (i have the email correspondence, if anyone is interested), all of thel perfectly gracious, to finally accept that the problem is in the AppStore - as you can see by kust looking above in this window. But nothing has been done, & my last emails have been ignored.
In other words, AppStore cannot be trusted to update applications you buy through AppStore.

flymj about X Word - for Microsoft Word Edition & Open Office Format