Was gibt es denn wieder neues in der neuen Cura 4.5 Version ? Gibt es wieder irgendwelche Funktionen die überflüssig sind ? Schauen wir es uns mal an, so dass ich Euch wieder die Änderungen auf Englisch rein schreibe. Also, alles wie beim alten. 
Ach ja, denkt an das sichern Eures Profils, nicht das dieses nach dem Update weg ist.
Michael O. gab einen einfachen Hinweis, dass man am besten die neue Cura Version parallel installiert und dann erstmal beide Versionen nutzt. Sollte man ein Update machen, ist die vorherie Version überschrieben. Bei einer „doppel“ Installation kann man somit mit beiden Versionen arbeiten und schauen, welche denn „besser“ ist. Danke Michael.
New printer definitions.
Native support has been added for 10 third-party printers. Find them in the „Add Printer“ list. Do you want to add a third-party printer definition to Ultimaker Cura? Here’s how.
Layer preview number.
In preview mode, the layer slider number is now at the top, instead of on the left, resulting in a neater fit next to the “Settings” panels.
Project name in window title.
Just as your web browser shows the page title next to the name of the application, Ultimaker Cura now shows the name of the loaded file in the title bar.
Bridge over low density infill.
Smartavionics has contributed a setting that determines if the infill density in a location is lower than the specified infill density, showing that the skin and walls above it should be treated as bridging.
Slicing features
Brim distance.
Also contributed by smartavionics, this setting allows you to define a gap between the brim and the model, resulting in easier brim removal and reducing chances of leaving blemishes or damage to finished prints.
Material mixing.
Should you have a mixing nozzle, you can make use of a new post-processing script to mix materials. Differently colored materials, for example, can be mixed in order to print in a different color than either of your currently loaded materials. Contributed by Hrybmo.
Infill mesh planning.
Another contribution from smartavionics optimizes the order in which infill meshes print their parts. It now takes the previous location into account rather than only the starting location.
Performance improvements
Crash logging.
We switched to a more robust provider for crash analytics, which allows us to develop a product with increased stability. We also added extra datapoints to crash reports.
Property checks on instance containers.
A speed optimization for reading setting values from profiles.
Bug fixes
S-line build plate temp limit.
Values over 125 °C will turn the setting input box orange for safety reasons. It is, however, still possible to print above this temperature.
Surface mode: Don’t combine overlapping.
Fixed an issue in which overlapping volumes combined incorrectly in surface mode. Contributed by BagelOrb.
Added “All Settings” visibility.
Fixed an issue in which selecting „All Settings“ visibility in „Custom“ mode would override custom settings when switching back.