Maximum text length

Yesterday I handled a large amount of files. Dolphin always writes a list of paths to the clipboard when copying/cutting files, so I got a huge entry into CopyQ that shows up on pretty much every search and lags out the UI. (For some reason I even got hundreds of these entries, but that might not be a CopyQ issue. But it did happen before with some automation, making this problem worse.)
I found no way to get rid of these, since the entries seem to be stored in `~/.config/copyq/copyq_tab_JmNsaXBib2FyZA==.dat` (what a filename…), a 9.2GB binary file that nothing I know can edit, also the export fails because of this size (I think it would need ≥18.4GB RAM) and there seems to be no way to mass-delete entries from within CopyQ. The only solution I found was to nuke the entire history.
But a much better way would be to not have this problem at all, by being able to set a maximum length for text, just like there is one for the maximum size of images. (There's probably a way to do this with auto-commands, but I don't know it.)

P.S.: Respect to CopyQ for pretty much never crashing or fully freezing, even when confronted with ridiculous amounts of data, it always recovered eventually!