1. I backup the user files folder,
2. I uninstall the FSB Pro
3. I install the fresh FSB Pro, and uncheck "preserve program setting"
4. I rename new "user files" folder to "user files2"
5. I copy paste the old "user files" from my backup to FSB Pro installation folder
6. I right click "FSB_Pro_Launcher.exe" files, choose compatibilty tab and check "run this program as an administrator"
7. Voila! The error is gone!

I notice this error happened since I oftenly changed the timezone when I downloaded historical data. I did it because I wanted to test strategies on various timezone.

here you are Popov

Hi Popov, the google drive link is gone, is it removed?
I just sent the link to you via PM.

It looks like the problem is connected with the data set you use. Can you zip your User Files folder and send me a link for download? I'll try to reproduce the problem.

For what it's worth, last night I ran into an array boundary exception (I know it's a very vague exception to troubleshoot) with the latest version as well but the app had been running for days beforehand.  When it popped up it was in the repository/multitester on test 80 of 100 against a different broker dataset.  Once it popped up I forwarded it along but it seemed to have entered a bad state and kept popping up on other screens until I restarted the app. 

Running it again under the same conditions didn't repro the issue so it's difficult to say what triggered that state but I thought I'd pass that info along.

I often close and restart FSBPro because the volume of data that is always changing.

Windows is a weird beast and makes weird things happen because it generates a gazillion files, I often reboot because of that

and. does it always happen or just sometimes.......

Try to give him more info.

Error report gives some info but not enough to be able to define the difficulty precisely.