Matrox RT.X100 project in Adobe Premiere RT.X2

If you open an old Matrox RT.X100 project using an RT.X2 installation, it opens as a standard Adobe Premiere project – without using any hardware acceleration, thus losing the entire point of the system. The answer is simple, but not documented anywhere:

Step 1: Create a new Matrox-based Project as normal

Step 2: Got to File, ImportĀ and import the old project (select Entire Project)
Now we have the project, but it still isn’t using the hardware or showing on the preview monitor

Step 3: Open old project sequence(s), select all and copy

Step 4: Open/create new sequence and paste the old sequence to the new sequence
Now the old project is using the new settings – simples!