Yes, thanks for clarifying....I should have twigged the OP was talking about tabs, I seldom use this function, probably because its a temporary deal and partly because I just plum forgot about them (it has been a busy 3 months or so and steep learning curve).
To clarify AFAIK the tabs views of the same library are suppossed to retain their respective view changes whilst you are still in tabs, ie while in the same library, different tabs. You can scroll through tabs with CTRl + tab, or Ctrl + Shift + Tab. You lose all tab changes when you navigate to a different library in the left organizational tree.
However, If you choose "Startup Interface to last location", in Options > Startup, it should retain the same tabs without changes when you close and reopen MC and this may partly address the OP's question.
The only other workaround is to create different libraries in the left organisational tree and they will retain customized changes (which is what I do).
For what its worth, tabs do not appear to be working properly in 18.0.188 as they do not always seem to retain their changes even before exiting that library.