Encryption

I just found a text file titled ':i^JnBOt\!%13', with this inside of it, on my laptop:

3_`XZA3E19C0iu774!(>4u4QN4XOM^FZO,&/k\;V1/^\--7s$f4^2,I7Q=+=7P[%U/4j,/Ag
9BO4sVX+5W`UR:K9JE%15185WV[kEc4!J@Tt0@B2!4r4"tMC<]XeABl?%E<@KUeCN1Xg4^2D
g4$"uIDK.RT5]8JC-X^g;4(DeO5WUMO4%2,J:-oBs:HD-'9g^sQ.V:Fr0e,L:4%Ltq:-(s3.
O$oJ=CY`!12Tu;3\jM\6om,A@5KrD4X!HZ7m:u]4^DVW:-`hD6r,rmBN$cN%14Og3F"UY@4E
E^6qp*:3\W6@A3+I'1j(li:h<H]=`6l24(h;aB0BNe=&hF-D)=^C9066X3Aj]HCca9t;(amb
1e9\i8mVr67n#I5<a0)t,:ZbP4"Dh"/NmB+93XAU4?lP$906684XOi$83f$d@WFO]BM9s?5W
3LK3bC`E;a>>6:aA;GAPad;/SScF%151*F&k4\:2W^73A2aRE&^i]5"n"-4t'/eAlU?[4"j5
[Bg#iV/5SJV?tqGX93!;a3_*"?><H;-5?BurF`'u;7n?Zu4=CXG6<mAK:FgBN5]94I,<RM?D
+$Ho@T+I47UeV`3b9fn+['1>;^+29@l%FPA7]mI5]L[&BKB[/68(6;5\rhO@7MSL4XO3C%15
3Y:G*k<5ZV*/>rcP*?YDPM-;dl.68pN23_N1%:d@oS5?Brs+_483F&t.W3APJQ5WVD!F%ebA
4"`i^.;NrP5Wj1+00'IK9O;R33_`XZAj'9lFZDI!;bhEs-nm2p4sOoa/NRE[DIPXZ-<Y"?=^
F-g3G'L?@ldC;DJqd>/3-Qi@VfUO4%`1"AiqMY%165s3_N1%:c^9X1,1dIE]Q0C5WrpT4^2D
[/imN\DIPkH?=GuVBhrk"5Wj1(4$,o77n,O6C*>f'AR6T14=haJ9KH]p+]AgW5]9/5<B=Z/0
1.m0<E=0%02>e83ADsRCH>0m-:g6j->-:=7n7<64(2T390cBqB4O(S4Zk,R90#:"

It looks like a code, but I don't understand it. I have put it through BASE64 and 32, Binary, Hex, but I get nowhere. Anyone else have a clue? And it now won't save again, saying the file name isn't valid. Typical.