I just went through this myself. What worked for me was to install ANY other theme (just pick something basic through wordpress) and activate it temporarily. Once you have a different theme active you can click on on the old alora 2.5.0 (parent) and delete it (Roman recommends making a backup of this first and that’s probably a good idea, I just copied the alora directory to my PC before deleting it). Once deleted you can upload and install the new 2.7.0 version and then activate it. After switching back to alora 2.7.0 all of my settings we preserved, my site looked the same and no further action was required. Hopefully my experiences will be helpful to you and good luck!