Editing own training extremly slow

[stefan_l_01]

Hi
On a win11 x64 system with i7 cores, I made some 12x30x30 sec blocks, 4 of them actually , almost 100 segments in total. It is extremly slow and unresponsive to edit this plan. It takes lots seconds until you can mark one block, again lots of seconds until you can delete it and even more until the operation finished.
You also can not mark multiple segments to delete them all in once?
This on a modern laptop with i7 cores. It´s a nuisance. To remove a full 12x30x30 block I would need 20minutes approx., segment by segment. This is ridicolous.
Please improve this and make the app more responsive and faster! Thank you
Stefan