Version 003
https://mega.nz/#!DC4zSZjZ!kpv0p54_OXNupd8BKNNig3A9ZMGQU2oEFO2JNZJ9yC8
Changes:

1. Can read older csv files (only had the test file on downloads page to test with tho)
2. Can identify Nm or lbft units and shows accordingly.

If you have any csv files that it wont open attach them on here and I can check whats different in its layout and make adjustments accordingly.

Found the issue, Older versions save the csv with a different layout in the headder.

Old layout of csv

Name:;Test1
Ambient temperature:;78.08;F
Horsepower correction factor:;1.027
Timestamp:;8/10/2016 10:36:00 AM
Comments:;First test
Time;RPM;HP;Torque (lbft);Lambda;Engine Temp (F);MAP;aux3

vs newer layout.

Name:;BMGJET
Units:;Metric
DecimalPoint:;.
Env sensors:;T:;21.3;C;Hum:;59.0;%;P:;1003.8;mBar
Horsepower correction factor:;0.994072182254573
Timestamp:;16/08/2018 10:03:01
Comments:;
Time;RPM;HP;Torque (Nm);Lambda;EGT (C);MAP;aux3;Wheel HP;Wheel Torque

Shouldnt be much effor to make a change to how it identifys a valid file.

Are you running it with same privileges as you run yourdyno app.
Such as if your running yourdyno as admin you'll need to run it as admin as well so it has the correct rights to open the file.

If that doesn't work and you don't mind sharing the csv its failing to open I can see whats different between the csv im getting thats stopping it from opening.

Im testing it and i get error "failed to open file". 

Hi, that's a great mod! ive do it before manually editing the file, it's not hard to do just with your software looks faster. looking the problems you have with the graphs maybe you need to get better setup for datalogg,etc, when i was using yourdyno the first time had too some problems wth graphs but everything Works good right now, just sometimes i get a peak at the end but very unlikely. 

Good job!

Video demo.
https://www.youtube.com/watch?v=6-0X-za-HKI

Turn CC (captions on for writen explanation of what im doing)