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Something go wrong with FinancialData[]

In version 11.3, when I import data like

FD = FinancialData["AS:AALB", "Close", {{2017, 01, 01}, {2019, 03, 31}}]

The result is a dataset like: {{2017, 1, 2}, 31.13}, {{2017, 1, 3}, 31.005}, {{2017, 1, 4}, 30.965}

In version 12 the result is a TimeSeries.

After the import, I usualy export the data to a SQL database. Now I have to use different steps. The problem is that the new version is not stable and each time I want to manipulate the dataset before export, my notebooks quit.

anybody recognise this issue?

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    $\begingroup$ Michiel, you describe the output of a TimeSeries but then you talk about difficulties exporting a Dataset. Could you give an example for what exactly does not work (so it can be reproduced)? On what machine are you? $\endgroup$ – gwr Apr 29 '19 at 15:43
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Have you tried wrapping the TimeSeries with Normal?

By which I mean, something like this:

FD = FinancialData["AS:AALB", "Close", {{2017, 01, 01}, {2019, 03, 31}}];

Normal[FD] /. {d_DateObject :> DateList[d][[;; 3]], q_Quantity :> QuantityMagnitude[q]}

Yields:

{{{2017, 1, 2}, 31.13}, {{2017, 1, 3}, 31.005}, {{2017, 1, 4}, 
  30.965}, {{2017, 1, 5}, 31.035}, {{2017, 1, 6}, 
  30.745}, {{2017, 1, 9}, 30.75}, {{2017, 1, 10}, 
  30.49}, {{2017, 1, 11}, 30.56}, {{2017, 1, 12}, 30.37},...
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