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I have been working in TVPaint 10 on El Capitan for a while now. However after I tried to make a guest account on my computer yesterday Tvpaint would give me an error that my dongle isn't plugged in. I tried reinstalling drivers and checked if my dongle was okay using a borrowed TVPaint 11 (which opened a trial since I have yet to upgrade). However I am scared of reinstalling TVPaint 10 because I have some custom panels I would like to export.
What can I do?

Hello,

There are 2 drivers that you can use on El Capitan :
ftp://ftp.cis-app.com/pub/hasp/Sentinel ... .4_Mac.zip" onclick="window.open(this.href);return false;
ftp://ftp.cis-app.com/pub/hasp/Sentinel ... MacOSX.zip" onclick="window.open(this.href);return false;

Try both and let us now.

Plus, make sure that you are using the last update of TVPaint 10 (10.5.7)