Not sure if this has happened to anyone else, but when I upgraded from 0.7.19 Rev 2 to the 0.8.1 Miranda Portable no longer loads.
The install completes successfully, but then when I launch the app it crashes immediately.
I've used dbtool to make sure my profile is in good order.
 
      
 Visit the Community page
 Visit the Community page Join our forums
 Join our forums Subscribe to our email newsletter
 Subscribe to our email newsletter Subscribe with RSS
 Subscribe with RSS Follow us on BlueSky
 Follow us on BlueSky Follow us on Facebook
 Follow us on Facebook Follow us on LinkedIn
 Follow us on LinkedIn Follow us on Mastodon
 Follow us on Mastodon
Try installing it into a different folder, without your current profile or plugins.
I use 0.8.1 portable here, on several machines without issues.
Best guess would be that there is an incompatible addon in your 0.7.19 install.
It ended up being the SmileyAdd plugin causing the problem. I updated the plugin to the most recent version and now 0.8.1 loads my profile without any problems.