I upgraded DG from 2017.2 to 2017.3 and lost names of files

@ Lexdrm What version you updated to (2017.3.X)?

2017.3.7

So, before the upgrade, these files were named in a logic way? 

Are these console files or just files in the folder you attached to the Files pane?

Console files

@Lexdrm 
Could you invoke 'Show in Explorer' action and check file naming:

Also, it'll be helpful if you e-mail IDE logs and console folder contents screenshot to vasily.chernov@jetbrains.com