Kdenlive 17.12.3 does not correctly load projects from 17.12.0d

[Harald Albrecht]

Hi,

after finally upgrading my Kubuntu from 17.12 to 18.04, I'm now in 
trouble: the stock 18.04 kdenlive is 17.12.3 and it does not correctly 
load my 17.12.0d project: effects on clips are missing, such as 
"distort" and "alpha operations". I've tried to install the master ppa 
version instead, but this is impossible as the ppa master lacks the 
required libmlt++3 and libmlt6.

What now?

(well, the 17.12.0d appimage still works)

Best regards,
Harald