I do not know Jennifer @littlekiwi . I suggest sending a PM to Leah @mommyish to check as it was not noted in the write up https://the-lilypad.com/store/iDSD-2020-Style-Bundle-CU-PU.html Sorry I couldn't help further.
@littlekiwi - I just got these, so I'll give them a try in my PSE and let you know. What version of PSE do you have?
@littlekiwi - They work in PSE 2019 and should work in PSE 11 and newer. I'm guessing they'll work in older versions too, just harder to install. Sometimes PSE doesn't clear out the previous layer style before the next one is applied so you may have to clear out the layer style between trying different styles to get the desired look. Or you may have to simplify the layer to keep a layer style you want and add another. In PSE you won't be able to make as many adjustments as you would in PSCC, but these styles work great as is in PSE and are really fun! I'm glad you asked about these because I would have missed getting them if you hadn't.
They should work with PSE 15. I was at PSE 14 before I upgraded to 19 and I only upgraded to 19 because of the text option upgrades it had. Otherwise, I'd still be at 14.