I have just written a note asking for help and now want to modifiy it but don't know where to find it.
Basically I need to install Negative Lab Pro as an add on. I have lightroom 4 which seems to be incompatible. However the site says that Lightroom 6, 8 , and lightroom Classic CC are all compatible.
Which is the most economical way to go and can you point me in the right direction. I assume Classic would be, but is that the same a Classic CC? There are so many options and this addon seems very particular. I couldn't get anywhere with Lightoom 4 as the plug in was rejected immediately.