"Releasing the old song" takes forever when loading older song

I made some songs with Renoise 2.5 but recently upgraded to 2.8
Whenever I try to load an old song it takes several minutes and it hangs for a while on the message ‘releasing the old song’ but eventually loads the song. Other times, it just hangs the whole renoise and I have to kill the whole task

Renoise 2.5 however works flawlesly on the same computer.
I also disabled all VST plugins from loading in 2.8 before loading a song?

Does anyone know why this is happening? And how to fix it?
I am running on windows xp.