I'm sorry I cant be more specific, I have tried to reproduce this reliably but failed.
Anyway, sometimes when deleting wires with the right mousebutton the program will crash (cedarls.exe has encountered a problem and needs to close. We are sorry for the inconvenience.) Typically this will happen if I add some component (I've tried it mostly with the counter) and add some wires and remove some wires. After a time Cedar Logic will crash. Sometimes immediately, sometimes I have to add and remove the wires for some time.
This can also happen when pressing the delete key after selecting many components.
I'm using cedarls_setup_1_3_1_ADCfix_Z80.exe
The "technical information about the error report" starts like this if it is of any help:
Code: 0xc0000005 Flags: 0x00000000
Record: 0x0000000000000000 Address: 0x00000000007cc6a0
Windows NT 5.1 Build: 2600
(Please tell me if more information is needed)