Deleted Blank card and it threw this error:

[pacificsquall]

[Window Title]
Error

[Main Instruction]
An internal error occured:

[Content]
invalid vector subscript
Please save your work (use 'save as' to so you don't overwrite things)
and restart Magic Set Editor.

You should leave a bug report on https://github.com/twanvl/MagicSetEditor2/issues/
Press Ctrl+C to copy this message to the clipboard.

Call stack:
[00] 00007FF67F3C5567
[01] 00007FF67F85B586
[02] 00007FF67F7F8670
[03] 00007FF67F7F0331
[04] RtlCaptureContext2
[05] 00007FF67F3653EC
[06] 00007FF67F5B12B4
[07] 00007FF67F5DFFB4
[08] 00007FF67F5E11E3
[09] 00007FF67F5DFEB8
[10] 00007FF67F44357E
[11] 00007FF67F5DFF0C
[12] 00007FF67F5E0D3A
[13] 00007FF67F4E9FE9
[14] 00007FF67F4F19E2
[15] 00007FF67F41F296
[16] 00007FF67F4EED6A
[17] 00007FF67F4EF610
[18] 00007FF67F431ADC
[19] DispatchMessageW
[20] SendMessageW

[OK]

[halian]

This repo hasn't received any commits in three years; try haganbmj's fork.