I just received my "bagged" copy of V4 and came to this forum to see if I could install it & keep V3 running as well. My concern was with backward compatibillity, co-existance of v3/v4, as well as any other install issues.
(I've been side tracked by all the rendering error posts & even an acknowledgment of an Mpeg render bug by Sofo.)
I got V4 to beat the $150 deadline as well as to keep current, however I'm wondering about even installing it 'til things shake out.
Can the two versions co-exist so my current v3 projects are not affected by a V4 install?
Should it be a standard operating procedure not to open old v3 projects in v4 and just begin new ones?
Of course I want the best but I hate doing the same work twice !!