Weird Location Profiles and Crashes

I have just updated to the latest portable version, 5.1.8 (3799)

Never had any problems before, but this time I see weird profile folders with numbers on. When I try and delete any the application crashes. Any idea what they are and/or where they came from? And also, how I get rid of them?

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Thank you.

Also, the number folders don`t always appear in the shared local profiles. They are usually there by default, but if for example, I enter the preferences dialogue and then close it the folders have moved to the session local profiles.

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Thanks for your report.

This bug is already fixed in 5.2.x branch:
https://winscp.net/tracker/1094

Thank you.