Can I Load BenchLink DataLogger 1 (BLDL1) and BenchLink DataLogger II (BLDL2) while having BenchLink DataLogger 3 (BLDL3) on my computer?

Yes. It is recommended that if you have previous BLDL1 and BLDL2 loaded on your computer and you want to switch to BLDL3, you should keep BLDL1 and BLDL2 handy for awhile so that you can export the datasets. You can import BLDL1 and BLDL2 configuration into BLDL3; however, you cannot import the datasets. To export datasets from older version, you have to use the older version to perform this task.