I have created a look in first light for the si2k to emulate the color look of a 7D. I tried importing the clip into Silicon DVR, however if I try to open the iridas color corrector in DVR2.0, it crashes the software.

The looks created in First light don't seem to be compatible. Any kind of fix for this or know why this is?

That is likely a question for Iridas. The looks exported from FirstLight only contain the 3D-LUT, not not any of Iridas's private data to is used the create the LUT under SpeedGrade. The SpeedGrade in SI-DVR is likely not expecting a .look created outside of the Iridas family, so they will need to fix that crash. However the LUT from FirstLight will not be modifable from SpeedGrade (certainly the lite version) as I don't expect it will use a 3DLUT as input and append to that data.