ElsieC,
sounds like a corrupted filesystem on IM (Internal Memory - the removeable drive named "READER")
I suggest to do a hard-rest (see:
https://wiki.mobileread.com/wiki/Sony...der#Hard_Reset)
But this will wipe all files from the reader.
To save your files you can try to, reset the reader by pressing the reset-button with a paperclip, slide the power-switch and immediately connect the USB-cord.
Reader should start up in data-transfer-mode so that you can save your files.
(With PRS+ installed this will be "Safe-Mode". Not loading PRS+ after disconnect form USB, so you will have standard Sony UI)
BTW:
Quote:
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At first I thought that meant to copy the folder PRSPInstaller from my PC hard drive to the 505.
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This should be perfectly fine.
And after applying the "Uninstaller" your reader will have the 1.0.0.18040 fw, so a new attempt to install PRS+, after formating IM, should work.
HTH
Mark
PS: feel free to post your questions in the sticky PRS+ tread on top of this page