I have managed to get an oldish version of Memoires from a
website that provided details and information about the app. I downloaded it as an apk file to my phone then just double clicked the file and it installed. Even though it was an old version 2013 (I think even the latest is not much older) it worked quite well, and I was able to restore a backup and enter password and I could see my data . I have now saved it all as an RTF file and cleaned it up to remove HTML tag conversions i.e. to < and now saved it as a word doc. That was my main concern to get my data back. If that is your problem, I may be able to help you further it you want. I am not going to continue to use the app as it is way out of date and not updateable. In fact the latest version is over 6 years old.. I think that is why it got removed from Play store because it had not been supported for so long.