I'm also getting an error attempting to update to the new version. I've tried suspending my Malware and Anti-virus. I also suspended my VPN. Still no luck. I haven't had do any of the aforementioned for previous updates. This one isn't baked yet. Return it to the development oven.
I was having the same problems updating to 5.52 described above, but tried one last time (before submitting this) and successfully somehow got it updated.
Prior to this, all I did was to clear the Firefox cache, restart my computer and download the setup file again. I opened the setup file from the File Explorer Downloads folder instead of opening it from Firefox. The first time this didn't work, but it did the second time. (?)
The previous version 5.51 and all other previous versions updated cleanly except 5.50 (which also was messed up, but I was able to eventually get it installed). What's with the lack of quality control, Piriform?
Those instructions by Nergal seem to be working for some people!<img alt=";)" data-emoticon="" height="20" src="<fileStore.core_Emoticons>/emoticons/default_wink.png" srcset="<fileStore.core_Emoticons>/emoticons/wink@2x.png 2x" title=";)" width="20"></p>