You can use the 'file' editing capacity of X32_Command. The file would contain OSC commands to delete your items, can be edited with standard text editor. Takes 3 minutes max.
The file:
...
/delete ,si <your item type> <number>
/delete ,si <your item type> <number>
...
See p 53 of the X32 OSC documentation.
X32_Command can be found at https://x32ram.com (free) under the 'download' section