[GTALUG] issue with gimp

I only run gimp on my main desktop computer. I use it from weekly, up to 6 weeks apart. I can't open any of my projects, I get this error message: Opening '/home/carey/sourcematerial/myproject.xcf' failed: XCF error: unsupported XCF file version 19 encountered which a query tells me means the file was created with a newer version of gimp than I have. I have not knowingly backleveled. I could try to update to see if there is a newer gimp, but thought I'd ask here in case that might only make it worse. Carey